How to find out the exact date of conception of a child. The influence of blood type. Definitions of the best day

Finding out the date of birth by the date of conception is very simple if there are no hormonal imbalances in the woman’s body and the fetus is healthy. Also, by this date you can almost certainly find out the gender of the expected child. Scientists have not figured out how this table works, but ninety percent of the time it tells the truth. How to find out the date of conception? Every woman should know and be able to do this thing, because it is extremely important. We invite you to familiarize yourself with the methods that will help establish the truth.

Date of conception: what is it?

This is the day when the fusion of male (sperm) and female (ovum) reproductive cells occurred. This is possible at the moments of ovulation, when the female cell enters the abdominal cavity from the ovary, but the duration of this period is extremely short, it lasts only two days. Pregnancy can occur exactly in these two days or 2-3 days before, but after that it is no longer possible. The fact is that sperm can exist in the female body for up to three days, and the likelihood that one of them will wait in the wings is extremely high.

Why is it necessary to know the date?

This is extremely important to know, as you can find out the gestational age. Based on the date of conception, doctors can determine a more accurate date of birth, and expectant mothers, using the tablet that we will present in further content, will determine in advance the sex of the baby. You need to know the date to undergo the necessary examinations, which are done on certain weeks. In addition, in the first weeks of pregnancy the fetus is very vulnerable, and during this period it is necessary to adhere to proper nutrition and a healthy lifestyle.

Any girl should understand how to find out the date of conception. Pregnancy is not always planned, and situations arise when a woman decides to terminate it. It is important to perform the procedure before seven to reduce the risk of complications and side effects.

Since calculating the day of conception directly depends on the day of ovulation, the calculation rules will be useful to those women who are planning to have a baby. Using the calculator, you can certainly find out the most suitable day for intimacy in order to get pregnant or, on the contrary, to avoid it.

Finally, knowing the date is important when disputes about paternity arise. Of course, you can take DNA tests, but this is an expensive procedure, and it requires both the baby and the father, and the second may not always be present.

How to tell if pregnancy has occurred?

If you miss your period (you are late), this may be a sign that conception has occurred. Before the delay occurs, you can take a blood test that will show the amount of human chorionic gonadotropin, a hormone that increases sharply during pregnancy.

If there are no periods, then a test is purchased. The presence of a negative answer does not guarantee the absence of a fetus, the test may simply be faulty, or your term is still too short, and the hormone has not had time to be produced in the required quantity.

If the tests consistently show a negative result, contact your antenatal clinic to see a gynecologist; you may have a hormonal imbalance.

We calculate the day of fertilization according to the menstrual cycle

You can find out the date of conception from your periods, but it will not be the most accurate, since the calculation of the period is carried out from (the beginning of) the last menstruation. It’s not a fact that you could have gotten pregnant then. Fertilization could occur before (and this happens, but rarely) or after the last menstruation. So, if you judge by menstruation, as doctors do, then the period is counted from the first, but not the final day of the last menstruation. Subtract three months from this date, add seven days, this way you can find out the expected day of birth. It won’t be accurate either, since everyone’s cycles are different, and the date of conception still remains in question.

Planning a pregnancy

Every girl should keep a menstrual cycle calendar, regardless of whether she has had sexual intercourse in her life. The calendar will help track delays, which may indicate not only pregnancy, but also hormonal imbalances.

A calendar can help calculate the optimal periods for conceiving a child. As a rule, ovulation always occurs in the middle of the MC, which is calculated from the first day (beginning) of the last menstruation to the first day of the upcoming one and ranges from 28 to 30 days. Accordingly, we choose the middle for conception - three days, two of which will definitely be the dates of ovulation. The remaining days before and after are considered “useless,” but there have still been many cases when pregnancy occurred during those periods, so using the calendar for “safety” is not recommended.

The calendar will help you plan the baby's gender. As a rule, girls are born after intimacy, which occurred a couple of days before ovulation. During this period, male cells are less active and remain the most resilient and strong, which guarantees the female sex. If sexual intercourse took place during the days of ovulation, then it will be a boy, because the egg will be fertilized not by the hardiest, but by the most active.

Electronic test

How to find out the exact date of conception if you have an irregular cycle and you are at a loss? A convenient, relatively new development - an electronic test - will help. How to find out the date of conception of a child using this device? It is extremely simple to use, just like a regular test that only shows stripes. The electronic test will indicate an approximate, but still quite truthful period, just subtract the number of days, and a more accurate date of conception will be determined. Look at your cycle in your calendar, “try on” the date calculated using the test, and correct the calculation by moving the date to the day of ovulation.

Ultrasonography

It is quite difficult to find out the date of conception by ultrasound, since this procedure is only necessary to confirm the obstetric “verdict”. Your day of conception will still be set to the day your last period began.

It is easy to find out the due date by the date of conception. Establishing the due date is much more difficult; it is calculated based on many factors. This is an obstetric guess for the day of conception, forty weeks are counted from it. The baby can be born at the 37th, 42nd, or 28th week. An ultrasound will also not indicate reliable dates of birth, only the period in which the baby is expected to be born. The weight of the fetus, the first movement and many other factors are also taken into account.

Is it possible to find out the date of conception by date of birth?

When the baby has already been born, you can find out, again, the estimated date of conception. Why is this necessary? Many people want to know this simply for the sake of curiosity, but for some it helps in determining paternity.

So, remove a week from your date of birth and add three months. Add two weeks to the resulting result again. This will be the estimated date of conception, and you will be able to verify the correctness of your belief about the father or refute it.

So, we have become familiar with the methods of how to find out the date of conception. Is it possible to determine the gender of the unborn baby using it? How to plan the birth of a son or daughter, focusing on the days of ovulation?

How to find out gender?

On the Internet, on the advice of friends and relatives, many couples want to find out the sex of the child. By date of conception, by blood type, by positions used - there are so many methods! Whether to trust them or not is a purely personal matter, but you can still try. It is easier to find out the gender of the child by the date of conception; for this, tables were created by the sages of the East. Some of them, such as the Chinese one, are more than seven centuries old and are kept in museums. You don’t need to go to Beijing to look at this sign; we bring it to your attention in this publication.

How to find out the sex of a child by date of conception: table from China

This tablet will help you plan the sex of your child or determine it before an ultrasound. The upper numbers are the month of conception, going from top to bottom are the age of the expectant mother. The letters at the intersection represent the meaning of gender. To use the table correctly, you need to add nine months to your age, because the Chinese count it not from birth, but from the month of conception.

We have already written how to find out the date of conception; what is important here is not the specific day, but the month in which ovulation occurred and fertilization occurred. Accordingly, in order to find out in advance who will be born and plan it, this table will help, because you can never be one hundred percent sure that conception has occurred or will occur on a specific day.

Possible table errors

Many couples plan everything, and pregnancy is no exception. It is important for parents that the baby is born in summer or winter, and therefore they choose the date of conception themselves. Many people don’t care whether it’s a son or a daughter, but there are still people who intend to give birth to a baby of a certain gender. This may be due to the fact that there are already three sons, and I want to finally braid my daughter’s hair and buy her elegant dresses. You can’t trust the table one hundred percent, and now we’ll tell you why.

It’s easy to find out your gender by the date of conception with a table if your ovulation occurs in the middle of the month or at the end. If it occurs in the first days of the month, then there can be a huge difference. As we have already written, male reproductive cells can live in the female uterus for up to several days. If sexual intercourse occurred in the last days of the month, and not in the first, then there is a high probability that fertilization will occur in the next month.

Parents can find out more accurate information about the sex of the baby from the results of an ultrasound scan, but this study can sometimes provide incorrect information.

Grandmother's method of gender recognition

People of the older generation are able to determine the gender of the unborn baby just by looking at the mother. They say that girls take away their beauty, but boys add it! If you have pimples, the contours of your face are blurred, then most likely you will give birth to a daughter. If the skin has become healthier in appearance, acne has disappeared, the contours of the face have become clearer, then expect a son!

You can also look at the tummy. Boys live in straight, straight bellies. If you look at the expectant mother from the back, the pregnancy will not be noticeable, since the entire belly has leaned forward. Girls distribute their belly to the sides, it does not protrude forward much, but it spreads well to the sides!

You can also follow your desires. Boys are less whimsical, and you won’t want to try fresh watermelon in the middle of winter, and even at night. This is for example. If you notice that there is a need to eat something that you would not normally consume, you can assume that you are expecting the birth of a daughter.

We hope that this publication will not only be interesting, but also useful. We wish you and your little ones great health, and this is more important than gender!

Use our EDA (estimated due date) calculator to calculate the estimated date of birth of your baby. The calculation can be made by the date of conception, or by the date of the last menstruation. Select the appropriate option and enter the original date. As a result of the calculation, you will receive the cherished date, as well as an accurate pregnancy calendar with comprehensive information about fetal development and medical indications for each week. The calculation results can be saved by email or printed.

Calculator for expected date of birth
with pregnancy calendar

Calculation option:

If you know the exact date of conception of the child, use the first option. Or choose the second option, the expected date of birth will be calculated automatically, based on the date of the start of the last menstruation.

Start date of last menstruation:

Cycle duration:

On average 28 days. If you don't know the exact length of your cycle, leave the default value.

28 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 days

Conception date:

Women strive to get as much information as possible about their new condition after learning about pregnancy. It is also important to find out how to calculate the due date and gender of the child, whether it is worth using an online calculator for this, what features and algorithms it includes. All this and much more is discussed in our article.

Calculating the due date - principles and algorithms

You can use several options to calculate the exact date of birth: an online calculator, your own calculations, the result of a doctor’s examination. But no matter which option is chosen, their principles and algorithms are very similar.

Determination of term by date of conception

The easiest way is to create a pregnancy calendar by week and calculate the date of birth if the girl knows the date of fertilization. Usually this is where difficulties arise, because a couple who has decided to have a baby tries not to miss any of the favorable days. Therefore, if it is not possible to calculate the due date based on the date of conception, you can try to determine it yourself. It's not that difficult to do.

To do this, it is worth remembering how the process of childbirth occurs in a girl’s body:

1. Bubbles form in the ovary immediately after menstruation. One is ahead of the others in growth and speed of development. It is in it that the female cell appears. The remaining follicles gradually disappear.
2. The cell reaches its peak development and is ready to function, breaks through the follicle and is released. Its path lies in the direction of the uterus. Here, in the reproductive tract, fertilization by sperm should occur under favorable conditions. You will need to know this point in order to calculate the date of birth based on the date of conception.
3. The fertilized cell continues its journey and ends with implantation in the uterus. This happens only 7 days after meeting the male cell.
4. Subject to normal consolidation, the fetus begins its growth and development. This process is facilitated by progesterone, which is produced by the corpus luteum. The latter acts as a temporary gland, which grows on the wound from the rupture of the vesicle. It always appears, but if fertilization does not occur, it is structurally destroyed by the day of the next menstruation, leaving a small scar on the ovary.
5. Changes occur in the structure of the mammary glands under the influence of progesterone. Signs of a new situation begin to appear, which is why the woman begins to look for ways to calculate the date of birth, create a calendar using a calculator, what tests need to be taken and when to visit her doctor for the first time.

Ovulation and date of conception

So, in order to create a pregnancy calendar and calculate the date of birth, you need to calculate the day of fertilization of your cell. How can this be done, given the presence of daily sexual intercourse, for example? First, it is worth remembering that conception occurs only at the moment when the cell has already freed itself from the follicle membrane and has entered the sexual tract. Those. It is very easy to calculate the due date based on the date of ovulation. As you know, this process is very short and is usually equal to a day, which is why the error in calculations is practically eliminated.

How to calculate due date using last menstruation

If the girl does not know the exact day of ovulation, it can be calculated based on her cycle readings. You need to look at the calendar and calculate the due date based on your last menstrual period.

Data for accurate calculation

You must first evaluate the following parameters:

• Cycle duration. Calculate the number of days between the indicated dates of menstruation for the last several periods. The standard is 28 days, but values ​​in the range of 21-33 days also occur.
• Systematicity. Compare the obtained numbers with each other. Normally, they should be equal, with a maximum deviation of 1 day. In such a situation, there will be no problems with how to accurately calculate the due date. There are also failures when in one month a shift suddenly occurs by 1-2 weeks. This is caused by stress, illness, the use of hormone-containing drugs, climate change, etc. There is no need to worry, this is normal. If the cyclicity is broken and each month the dates differ by 5 or more days from each other, the rhythm is considered irregular. This is not scary, it’s just that calculating the gestational age and due date will be much more difficult. If such failures have not occurred before, it is better to consult a gynecologist about the reason for identifying possible problems.
• Duration and characteristics of menstruation. Normally, they should be of the same type in structure, abundance and duration every month.

Ovulation in the menstrual cycle

Knowing the parameters that the calendar gave us, it is not difficult to calculate the due date if you identify the day of ovulation. It is calculated when it is necessary to calculate the date of birth based on menstruation, based on the following knowledge regarding the duration of the ongoing phases in the female cycle:

1. The time of follicle and cell generation is 11-17 days. It differs significantly among women due to the different levels of hormones in the body and their balance. The standard is 14 days, but it is possible for girls whose cycle has been unchanged for a long time and is equal to 28 days.
2. Release of the cell and its path to the uterus. If sperm are not encountered along this path, it will last only a day. Rarely, life activity can be longer - up to 2-3 days; usually, it dies within 12 hours. That is why pregnancy, calculating the date of birth for which would remain the last unresolved issue for a girl, the date of ovulation must be identified as accurately as possible in order to prescribe a productive act.
3. The functioning of the corpus luteum in the absence of a fetus ends after exactly 14 days. This criterion is the same for everyone. Very rarely, it can be 12-13 days.

The last number is known for certain, it is equal for all girls, and therefore ovulation is calculated by it. The formula looks like this: subtract 14 from the duration of the monthly process. The result obtained must be counted from the previous menstruation and marked on the calendar. This is the date of ovulation, which is the moment of conception, because on other days this is not possible due to the lack of a ready-made cell. Now it’s easy to even prescribe a birth calendar yourself and calculate it based on the date of conception identified in the described way.

Methods for determining cell yield

• Tests. After using the strip according to the instructions (dipping it in urine for a few seconds or holding it under running water), you need to look at the color change of the reagent. It shows the concentration of luteinizing hormone, which reaches a maximum when the follicle ruptures.
• Microscopes. These are reusable devices that allow you to see the pattern of salts contained in saliva. It gradually changes, acquiring the features of a fern by the day the cell appears. It will be enough to calculate the day of birth according to the date on which it manifested itself most clearly.
• Discharge. It is known that during the development of the follicle, vaginal mucus has a thick structure and does not ooze out. And by the time the cell is “born,” it liquefies and is released in very abundant quantities. In structure and color it is similar to egg white. It is observed until the cell dies.
• Pain. Unpleasant sensations are felt on the side of the ovary. By tearing the follicle, the cell creates a regular wound on it, which causes slight pain. Relying on your own feelings and remembering the exact date of the onset of pain, it will be easy to calculate the date of birth based on conception.

Predicting the gender of the child - what you need to know

We found out how to correctly calculate the due date by first identifying the exact day of fertilization. Now all that remains is to count 40 weeks from the date, making notes on the calendar. Sometimes girls want to not only calculate the due date, but also find out the sex of the child earlier. This can be done by comparing the date of sexual intercourse with ovulation:

• The act occurred on the date of ovulation or a day later - a son is expected. This is due to the characteristics of male sperm with a Y chromosome, which are much faster than type X cells. Y will overtake a female cell many times faster, leaving no chance for its slow counterparts. Having identified a pregnancy, it is very simple to calculate the date of birth and the sex of the child using the principles described above.
• The act happened in 1-2 days - the maximum probability of conceiving a daughter. This is explained by the fact that Y-cells die within a day, once in the genital tract, and therefore do not wait for the female to appear. X cells last up to 3 days, and therefore, although they are very slow, they will already be waiting for the female by the time she appears in the sexual tract. When compiling a calendar to calculate the date of birth and the gender of the child in such a situation, you must also take into account the day the cell appeared, despite the fact that the act took place earlier.

Thus, regardless of whether the conditions for “getting” a baby of the desired gender are met, you will need to calculate the due date based on the day of conception. After all, without the presence of a female cell in the tract, sperm cannot fertilize anyone.

Calculator - how to calculate your due date online

Calculation by date of conception or last menstruation

Therefore, today there are two options for filling out data:

• calculate the date of birth based on conception: the calculator counts the standard days of pregnancy from the day known to the girl;
• calculate the date of birth using menstruation: the calculator determines the moment the cell appears, therefore the formula requires a cycle length parameter. If the girl does not know him, they recommend leaving it for 28 days. But in this case there may be an error.

Pregnancy calendar is a useful feature

As a result of the calculation, the girl receives a specific date for the expected birth. But that's not all. Our service has an additional function that allows you to calculate the date of birth and pregnancy by week at the same time. In this case, the girl receives a table written for each week of pregnancy, indicating her dates, containing the following interesting and useful information:

• Fetal development: at each stage, the embryo undergoes certain changes, because it is constantly developing. You can find out when his muscle tissue begins to grow, internal organs form, and when he begins to hear.
• Medical indications: at each stage, the baby’s body, based on the characteristics of its formation, requires different microorganisms, which are listed in the tablet. The girl will also learn when to expect toxicosis, discomfort, heartburn, and how to protect herself from them without harming the baby.

After the girl has calculated the due date and week by week, having received a detailed action plan, you can save it electronically by clicking on the “send by mail” icon. It is also possible to print the table to have it on hand.

Medical indications – tests, ultrasound, etc.

Using the pregnancy calculator to calculate your due date on our website, you also receive information about the required dates for tests and ultrasounds. This will allow you to monitor the doctor’s actions and better prepare for visits and examinations. Calculating the due date online is a simple way, due to which the girl does not need to make calculations on her own, and in return she receives maximum useful information on her specific case.

Calculation for irregular cycle

Some difficulties await women with irregular processes, then difficulties may arise in identifying ovulation. They can only calculate the date of birth based on the date of conception; the online calculator in this situation will give the correct answer. If they want to calculate the date of birth based on the last menstruation, the calculator may make a mistake, because the result depends on the length of the cycle, which is always different for a girl.

Determination of the due date by a doctor

Many are sure that only the specialist observing the patient can calculate the exact date of birth. But it is worth remembering that it is based in its readings on the same data as the methods discussed above. The doctor, if he did not observe the girl before pregnancy, will ask her for the following information:

• First day of bleeding;
• Cycle duration;
• Systematicity;
• Presence of rhythm disturbances and deviations.

Based on these criteria, he will make a calculation and determine the expected date of birth. Most likely, this date will coincide with the date of birth, which can be calculated using the date of conception online. There may be a slight error of 1 day due to the “human” factor or unaccounted for factors.

Ultrasound calculation accuracy

If the doctor wants to calculate the due date using an ultrasound, the calculator will most likely fail. After all, during the study he is able to see the size of the embryo and compare it with the standard. However, an error is also possible here, because each organism develops in its own way, and embryos can differ slightly in size in girls at the same age.

Determination and stimulation of ovulation

Therefore, calculating the correct date of birth is only possible mathematically, based on knowledge about the day of fertilization or by finding out the exact date of ovulation. If a girl has problems with this, she should go to the hospital at the planning stage so that the doctor can monitor the development of the egg using an ultrasound. Already from the 5th day after menstruation, examinations begin every two days. When the cell exit approaches, ultrasound may be prescribed daily. Having discovered a burst follicle or a day before, the doctor will inform the patient about the most favorable moment for fertilization.

From the video you will learn on what day you need to do an ultrasound to find out whether the follicle is maturing

A similar examination scheme occurs if a girl has problems with cell reproduction (the follicle does not develop or does not burst). This is due to a deficiency of the hormone estrogen, and therefore it is administered forcibly through a special course of drugs.

With such strict monitoring of the stages of cell development, a calculator is not required to accurately calculate the date of birth. After all, the girl and the doctor will reliably know the day of fertilization. During subsequent observation, the doctor will monitor the moment of implantation of the fertilized egg. The woman will not need to perform a test or donate blood, because the ultrasound will show the fact that the embryo is implanted, which guarantees pregnancy, and it will not be a problem for the doctor to calculate the due date based on the date of conception, knowing all the facts.

conclusions

The expected date of birth, which can be calculated in several ways, will give the girl an accurate idea of ​​how long she will have to wait for her little “miracle.” You can use any of the above methods or try them all. Usually, deviations between them are no more than 1-2 days. We recommend using our calculator and calculating your due date by period (or by conception) online. In this case, in addition to the expected date of birth, in addition, the expectant mother will receive a unique guide to action and tools for monitoring the development of her baby week by week.

Reading time: 5 minutes

Doctors strongly recommend that women mark the beginning of each period on a calendar so that, based on this data, they can calculate the date of ovulation and calculate the period of conception of the child. Not every sexual intercourse leads to the fertilization of an egg. For a successful pregnancy to occur, a number of processes must occur in a woman’s body, which will be discussed below.

What is the period of conception

From the first day of the cycle, the body begins to prepare for pregnancy. Follicles mature inside the ovaries. One develops faster. At the moment the follicle ruptures, the mature egg penetrates the fallopian tube. This process is called ovulation. An unfertilized egg lives for a day. If fertilization does not occur, she dies and comes out with menstruation. Sperm are more viable. Some die on the way from the vagina, but those that penetrate the fallopian tubes wait for an egg for 3-4 days. The period of conception is a period in the middle of the cycle lasting 4 days: three before ovulation and one after.

What does knowing the date give?

To calculate timing of conceiving a child, you need to calculate the date of ovulation. Sexual intercourse should occur no earlier than 4 days before, and no later than 24 hours after it. This useful to know for those who dream of getting pregnant or, conversely, do not want children. If pregnancy has occurred, it is impossible to accurately calculate the day the child was conceived, but you can calculate when this happened most likely.

How to calculate the date of conception

To calculate favorable dates, you need to determine when ovulation occurs, in the following ways:

• calendar method;
• measurement of basal temperature;
• ovulation tests;
• folliculometry.

Any method has an error. Even a healthy female body is fickle. Sexual contact can cause premature release of the egg, and stress and fatigue can cause late ovulation. A woman can determine the onset of the ovulatory period by sensations. Indirect signs of ovulation:

• pain in the lower abdomen;
• mucous discharge from the vagina;
• change of mood;
• increased sexual desire.

Calculate the date of conception based on the last menstruation

Doctors consider the date of conception to be the first day of the last menstruation. The obstetric period exceeds the embryonic period by two weeks. With an irregular cycle, the difference between them is significant. The advantage of the method is that women know the date of their last menstruation. The calendar method for determining ovulation is suitable for regular cycles. For several months, record information about the beginning of menstruation in your calendar. Divide the average cycle length in half. If you add the resulting number to the first day of your last period, you get the date of ovulation.

Date of conception by date of birth

To calculate the day of conception of a child, you need to subtract a week from the preliminary date of birth and add three months. This is how the obstetric gestational age is determined. Add another two weeks to get your fertilization time. This is an imprecise method: not all babies are born at term. If you remember the estimated date of birth announced by the gynecologist, then by making calculations with it, you can guarantee greater accuracy. The advantage of this method is that it helps establish paternity without genetic tests.

Basal temperature measurement calendar

During ovulation, hormonal changes occur in the body, causing an increase in basal temperature. This is a natural process. Measure the temperature in the anus daily and record it in a table. To minimize the error, follow the rules:

• take measurements at the same time in the morning;
• without getting up, measure your temperature motionlessly for 5 minutes;
• Perform measurements with one thermometer, since the error matters.

It is pointless to measure the temperature in other places; it only rises in the anus. If a woman is overheated or sick, the thermometer may show high numbers, but this will not be related to ovulation. The basal temperature calendar for an irregular cycle allows you not to miss the moment of egg release, but it requires painstaking work.

Calculate days of conception online

Women monitor their periods for delays. Previously, they were forced to cross out “red” dates manually; now there are services that record observations of the menstrual cycle online. The program will help you calculate the period favorable for conception and suggest safe days. The female calendar should not be used as a method of contraception. Record your basal temperature, mood, well-being, discharge, sex in apps. This information will help when planning a pregnancy and when visiting a gynecologist. Convenient applications:

• Feminap (Android);
• Menstruation: Women's Calendar (iOS);
• 4WomenOnly (Windows);
• Flo – women's calendar of periods and pregnancy (Android, iOS).

Folliculometry

A reliable method of monitoring the stages of egg maturation is folliculometry. Painless ultrasound diagnostics are performed externally or vaginally. The gynecologist selects the timing of the examination: 7-12 days from the start of menstruation with a regular cycle and 3-5 days with an irregular one. Research is carried out daily or every other day before ovulation. If the egg is not released, an ultrasound is performed before the next menstruation.

Folliculometry is an accurate method that requires a visit to the clinic and financial costs, therefore it is recommended for women with:

• infertility;
• hormonal disorders;
• preparation for artificial insemination;
• stimulation of ovulation;
• carrying out IVF.

Special tests

Pharmacies sell strips similar to pregnancy tests to determine ovulation. Diagnosis is based on the content of luteinizing hormone in the urine, indicating the readiness of the egg for fertilization. 17 days before menstruation, you need to conduct such a study 5 days in the morning and evening. In addition to tests that analyze urine, there is a perfect a reusable system that examines saliva.

Device works on the principle of a microscope. You need to drop saliva onto the glass and wait for it to dry. An ovulation microscope analyzes the remaining trace. Progesterone and estrogen affect the composition of saliva. The device has many advantages. To carry out a diagnosis, you do not need to look for a toilet. Thanks to accuracy and simplicity, you can calculate not only favorable days for conception, but also safe days.

These tests can be used to predict the sex of the baby. If sexual intercourse takes place on the day of ovulation, it will probably be a boy, since Y sperm are faster than X. If sex took place a few days before, then a girl will most likely be born. This result is explained by the fact that more viable X sperm have a better chance of waiting for the egg to be released.

How to find out the day of conception of a child when you are already pregnant

The doctor can determine the date of conception as accurately as possible by the level of the hCG hormone and ultrasound results. In the first trimester of pregnancy, the indicator for establishing the gestational age is the size of the uterus, which depends on the intrauterine size of the fetus. This is necessary to clarify the PDA (preliminary date of birth). At later stages, the expected day of conception can be assessed by the rate of development of the child and the baby’s movements.

Video

The term “ovulation” itself comes from the Latin ovum - egg; This is the name given to the process of release of a mature egg capable of fertilization from the ovary into the abdominal cavity.

Physiologically, ovulation is one of the stages of the menstrual cycle. Ovulation in women of childbearing age occurs periodically, every 21-35 days - in the middle of the menstrual cycle (the cycle is usually counted from the first day of menstruation). The frequency of ovulation is regulated by hormones from the pituitary gland, an endocrine gland located in the brain, and ovarian hormones (estrogens and progesterone). Ovulation stops with the onset of pregnancy and after the cessation of menstrual function.

The most favorable time for sexual intercourse for the purpose of conception is when ovulation is about to occur and sperm have enough time to enter the fallopian tubes, where they “wait” for the release of the female germ cell, or immediately immediately after ovulation, when the egg is already in fallopian tube.

Day of Conception

If you correctly calculate what day ovulation will occur and have sexual activity during this period of time, then there is a high probability that the woman will become pregnant.

So, how can you determine ovulation? First of all, using subjective signs. This may include short-term pain in the lower abdomen, a feeling of a “bursting bubble” in the middle of the cycle, some women note an increase in sexual desire - this is due to the release of estrogens during ovulation - female sex hormones that are produced in the ovaries. Some signs can be detected during a routine gynecological examination, although it is difficult to imagine that a woman who believes that she has no reproductive problems will consult a gynecologist just to determine ovulation. However, a woman can notice a number of signs herself.

The day of ovulation can be determined by observing the secretion of mucus from the cervical canal. The maximum secretion of mucus is associated with a sharp increase in estrogen levels and coincides with the moment of ovulation. In addition, sometimes the stretchability of mucus is used, and its crystallization is also observed. During ovulation, the mucus becomes very viscous, it can be stretched between the fingers up to 8-10 cm. The more pronounced the crystallization, the greater the likelihood of ovulation. This phenomenon is most clearly manifested 3-4 days before ovulation and reaches a maximum on the day of expected ovulation. Crystallization is the result of biophysical and biochemical changes in the cervical mucus. During this period, there is an increase in the amount of mucus and an increase in the concentration of salts, primarily sodium chloride, which, along with potassium ions, is responsible for the phenomenon of crystallization. With pronounced crystallization, mucus looks like a fern under a microscope. There are special microscopes for home use that you can apply mucus or saliva to. The main changes occur precisely in the vaginal mucus, but they also affect the entire body, so for convenience they began to work with saliva, in which it is also possible to determine the symptom of crystallization. The action of the Baby Plan ovulation detection device is based on this phenomenon.

The next most accurate and informative method for determining ovulation is measuring basal temperature - the temperature in the rectum. The method is quite simple and does not require virtually any special equipment other than a regular medical thermometer.

Basal temperature is measured with the same medical thermometer in the morning, immediately after waking up, without getting out of bed. The measurement must be carried out at the same time, inserting a thermometer into the anus to a depth of 4 - 5 cm. Temperature measurement data is plotted on a graph, the vertical axis of which is the temperature, and the horizontal axis is the day of the menstrual cycle. The chart also shows days of sexual intercourse.

For many women, careful monitoring of the basal temperature chart can reveal that before the temperature rises, there is a short drop in temperature. According to this method, it is believed that the moment of ovulation occurs 12 hours before the increase in basal temperature or between the decline and the beginning of its rise.

Is it possible to choose the gender of the child?

When planning a pregnancy, few potential parents do not think about how to choose the gender of their unborn child in advance. Some need a boy, others need a girl. Such planning becomes especially relevant when the family already has one child. As a rule, parents dream of having a second child of the opposite sex.

There is only one way to more or less scientifically soundly try to plan the gender of the child. A sperm with a male set of chromosomes moves faster, but lives shorter than a sperm with a female set. Therefore, the coincidence of sexual intercourse with ovulation (about 14 days before the onset of menstruation in a 28-day menstrual cycle) increases the likelihood of having a boy, and the birth of a girl is more likely if intercourse occurs 2-3 days earlier. However, this rule does not always work, since it concerns the classic situation of parents who are “super healthy” in all respects. If one of the partners has health problems, this, as a rule, affects the “speed characteristics” of sperm. For example, this happens when the acid-base balance of the genital tract is disturbed or the qualitative composition of the secretion changes in women, or when physical fatigue occurs in men (it also affects the mobility of the “livelings”).

But all these listed methods give only approximate results. Their accuracy makes it possible to determine the moment of ovulation only by using all of them in a comprehensive manner and with fairly long-term observation. What allows you to accurately determine the moment of ovulation and guarantee it to be documented? Strictly speaking, there are only two such methods.

The first is ultrasound monitoring of the growth and development of the follicle - the vesicle in which the egg matures, and determining the moment of its rupture - ovulation itself. Often, with the use of modern devices, it is possible to see even the moment of release of the egg, if the study is carried out at the right time.

The second method is the dynamic determination of luteinizing hormone in urine (this is also an ovarian hormone, the amount of which increases during ovulation). This method is much simpler and can be used at home, for which special tests are used. Tests begin to be carried out 2 times a day (every 12 hours) 5 - 6 days before expected ovulation, strictly following the instructions attached to them. The determination is stopped after receiving the first positive result. Ovulation occurs approximately 16-28 hours after the first positive test result. To control, you can immediately conduct another test. The most convenient and informative use of tests for luteinizing hormone in conjunction with measuring basal temperature. Dynamic determination of luteinizing hormone was previously used only in specialized medical institutions, but now there are test strips, the same as for determining early pregnancy. Such tests are sold in pharmacies. Thus, the problem of determining the moment of ovulation should be considered practically solved.

It must be said that if there are no alleged problems with conception, then you can start with a simpler method - calculating your ovulation based on the duration of the menstrual cycle. To do this, as we have already said, the duration of the menstrual cycle must be divided in half. You can start “working” on conception, taking into account the fact that some sperm live up to 7 days, a week before the expected ovulation, the favorable period will end 3 days after ovulation.

Keep in mind that pregnancy may not occur immediately during the first “dangerous” period, because... Even healthy young women have 1-2 cycles a year in which ovulation (the release of an egg) does not occur.

In addition, ovulation is affected by stress, climate changes, etc.

Conception position

After you have calculated the most favorable days for conception, you must avoid douching, any soap and similar products after sexual intercourse. Firstly, the very fact of washing contributes to the mechanical removal of sperm, and secondly, hygiene products create an environment in the vagina that is unfavorable for sperm. And before sexual intercourse, you should take a shower in advance (30-60 minutes) so that a normal, natural environment can be restored in the vagina.

Couples who want to conceive often wonder: is there a special position they should use? It's safe to say that any position acceptable to both partners will do. After sex, it is better to lie on your side or with your pelvis elevated for 15-20 minutes to prevent sperm from leaking out.

We hope that our tips will help you move into the category of future parents as quickly as possible.

How often does a woman, upon learning that she is pregnant, try to determine the date of conception? Almost always when sexual activity is regular and the birth of a child was not planned in advance. It is necessary to know the date and month when fertilization occurred, at least in order to determine the exact date of birth. Today, knowing some of the individual characteristics of your body, you can easily determine the date of conception online using a calculator. In 95% of 100, the calculator will accurately indicate the day when this happened.

Of course, if you planned conception in advance, prepared for this day, visited a family planning center, signed up for consultations and kept diaries and calendars of menstruation and days of fertilization, then you can probably accurately indicate this day. And if not? Most often, at a doctor's appointment, girls who were not expecting pregnancy get confused about the dates and cannot concentrate, indicating the date when sexual intercourse took place. It is even more difficult to calculate the exact date of birth of the baby if you cannot remember with an accuracy of one or two days when fertilization occurred.

Proven methods for determining the date of conception

At an appointment with a gynecologist who has confirmed that pregnancy has occurred, you will often hear questions related to your last period. The doctor will definitely ask what dates your last menstruation took place, when it started and how long your menstrual cycle usually lasts. Sometimes doctors use the delay in menstruation to determine the date of conception, but the main one is still the first day. To do this, it is recommended that all expectant mothers be sure to keep a record, carefully and regularly writing down the start and end dates of menstruation.

The gestational age is calculated in several ways:

1. On examination by a gynecologist. The date will be determined very conditionally, since in the early stages it is impossible to do without additional examinations and knowledge of your individual data and the doctor’s calculations;
2. Most likely, you will be taken for an ultrasound, where the exact day of conception of the baby and the expected gestational age will be determined. This method is scientifically proven and the most reliable. However, an ultrasound will show that you are pregnant only at 5-7 weeks, not earlier. And the exact date of birth will be set between 9 and 16 weeks. In addition, an ultrasound may be mistaken if the child’s development occurs non-standardly - the fetus is too small or large;
3. Date of conception based on last menstrual period. A very common way to determine if your cycle does not “float”, but your periods begin exactly on certain days. If the break between menstruation each time shifts in one direction or another by at least one day, then with such calculations it will be difficult to find out the exact date of birth.

Both methods are widely used by doctors to determine the day of conception and set the gestational age. When making calculations, it is important to take into account the individual characteristics of the mother’s body and possible deviations in the development of the fetus during pregnancy. The baby may be born ahead of schedule, or may “stay” in the womb and be post-term.

Determining the date of conception by the menstrual cycle

How to find out the date of conception from the menstrual cycle if it is stable? Fertilization of a woman's reproductive cell occurs in the middle of the menstrual cycle, so if a girl's periods occur with a cyclicity of 26 days, then 13 days must be counted from their start date. Be sure to take into account when calculating the fact that an egg can only be fertilized within 24 hours, but the life of a sperm in your body is on average from one to three days. Even if you remember the day you had sexual intercourse, it may not always coincide with the day of conception.

For more accurate calculations, if you keep a monthly calendar, you can use an online calculator. By entering only two numbers into the required cells - the average cycle length and the first calendar day of the last menstruation, we will quickly get not only the date of conception, but also the estimated date when the baby can be born.

What to do if the cycle shifts by 1-2 days from time to time? The date of conception according to the calculator is also suitable in cases where the cycle fluctuates. It is recommended to write in the cell exactly the average number of days between menstruation, which you can easily determine by carrying out simple calculations using your individual calendar.

By specifying the date of conception, you can determine the gestational age and the expected date of birth of the baby. It is not entirely correct when the expectant mother immediately adds 9 calendar months to the day of conception. Carrying a child in the womb takes 40 weeks, or 10 lunar months, which is equal to 280 days. This common mistake can play a not very good role in the future, when, instead of going to the maternity hospital on the right day, you go out of town to the country, significantly increasing the distance that will need to be covered in the event of contractions.

An online calculator will only help you accurately calculate the date of conception if you definitely know when your last period was. Typically, gynecologists very quickly calculate the approximate date of birth of the child, and then confirm or correct it with an ultrasound. Doctors choose the starting day of the last menstrual period as a starting point. 280 days are added to this date, and then the approximate period left for ovulation is subtracted - 14 days.

Doctors make these calculations in their heads and very quickly, because they have to deal with this almost every day. For a woman who has learned about pregnancy and quickly wants to determine the day of conception and birth of the baby, such calculations and formulas may seem too confusing. In addition, the first news of pregnancy, if it was not planned in advance, most often makes future parents nervous, and in this state it is very difficult to make accurate calculations.

Take advantage of the offer and determine the date of conception using a calculator. This will help you calculate the baby's date of birth, prepare for this day and be attentive to the pregnancy throughout the nine months.

Doctor Komarovsky: preparation for childbirth

If your pregnancy is confirmed, then I sincerely congratulate you on this bright event. Carrying a baby is a wonderful, unforgettable and special period in a woman’s life. And not everyone is given this boundless happiness - always remember this!

Nothing can compare to carrying and giving birth to a baby. And no life problems, difficulties and troubles can exceed the significance of this event. Therefore, I can’t even imagine why a woman needs to know with accuracy the day on which conception occurred. However, many of us are trying to determine the date of conception of a child, and we must admit, this is quite difficult to do.

How to determine the day of conception?

Calculating the exact date of conception, if it has already taken place, is simply unrealistic. It is only possible to determine the probable day of conception of a child, but this date will never be one hundred percent correct. This is because in fact, conception can only take place during the period of ovulation. And unless you calculate ovulation every month over a long period, you can only roughly calculate the days on which it could have occurred in the last cycle. To do this, subtract 14 days from the date on which you expect your next menstruation to begin. It is believed that ovulation occurs on average 14 days before the start of the next menstruation: with a 28-day cycle it occurs on the 14th day of the cycle, with a 30-day cycle - on the 16th, with a 24-day cycle - on the 10th, and so on Further. But this is a very arbitrary guideline.

A specialist performing an ultrasound examination will be able to determine the date of conception more or less accurately. He will tell you the approximate gestational age, which also cannot be considered infallibly correct.

The fact is that ovulation can be influenced by a large number of different factors that none of the known methods for calculating the date of conception and birth of a child can take into account.

How to determine the day to conceive a child?

If you are trying to determine the most likely or, then everything is much simpler. To do this, you need to calculate with maximum accuracy the day on which you ovulate. There are many different ways to do this:

• by basal temperature: ovulation occurs after a temperature drop, observed one day before the release of the egg from the follicle (a decrease in BT by 0.1-0.2 degrees is noted). Then, after ovulation, the indicators increase by 0.2-0.5 degrees and exceed 37°C;
• by the nature of vaginal mucus: before ovulation, sticky and thick vaginal discharge in the first phase of the cycle becomes viscous and transparent, like egg white. The release of a mature egg may be accompanied by damage to the blood vessels, which a woman observes with minor impurities of blood in the vaginal discharge in the middle of the cycle;
• according to ovulatory syndrome: some women with increased sensitivity may feel nagging pain from the active ovary and even complain of short-term malaise during this period;
• by using: it works on the same principle as a pregnancy test, only unlike the latter it reacts to an increase in the concentration of the so-called fertility hormone (LH - luteinizing hormone);
• folliculometry method: The process of egg maturation is monitored by ultrasound, which allows one to accurately determine the day of ovulation.

In addition, an experienced gynecologist can quite accurately determine the approach of ovulation during an examination of a woman in a chair.

The most reliable result can be obtained by combining several methods at once.

A few days to conceive

Finally, we note that, even knowing the exact date of sexual intercourse that caused pregnancy, we cannot say with certainty that it is also the date of conception of the baby. After all, the journey of sperm to the egg can take more than one day. Moreover, the sperm that has already arrived at its destination can wait for the egg to leave the follicle, if this has not already happened. Therefore, experts say that theoretically, conception of a child can occur as a result of sexual intercourse performed a few days before ovulation and a day or two after it.

Thus, you cannot accurately determine the day the child is conceived, but you can look forward to his birth and become the best mother in the world for him! Is there anything more important?

Good luck to you!

Especially for Elena Kichak

Do you already know that you are pregnant? This is wonderful! But sometimes women have a completely logical question: when did conception occur? And this question arises not out of curiosity, but in order to determine as accurately as possible the expected date of birth of the child. What does the expectant mother need to know for this?

Calculating the day of conception

Then you can start calculating. The normal period of pregnancy is considered to be 280 days from the moment of conception. Or, otherwise, 40 weeks or 10 months. Sometimes the question may arise why 10 months and not 9. This number is due to the fact that usually the beginning of pregnancy is called the first day of the last menstruation. Although if you know exactly the date of conception, then the calculations are quite simple.

Probably many women asked the question of why gynecologists count only from the first day of menstruation. Namely, in the fact that girls in most cases do not remember when the last sexual contact was, and the whole secret lies. Although sometimes another equally interesting question arises when a girl tries to find out who the father of her child is. Such stupid situations arise when there are several sexual partners.

But sometimes women make it easier for themselves to determine the date in this way. That they keep a special calendar where they mark their menstruation. So, you remembered when you had the first day of your last menstruation. Then everything is very simple: you need to add 40 weeks to this date. Or, on the contrary, subtract three months and add 10 days. The date and month that you get as a result will be the expected date of birth of your child.

Calculator for determining the day of conception

It is very important to know the approximate date of conception, because then you can also find out the date of birth in order to prepare for it as much as possible. In order for the calculations to be more accurate, in addition to the doctor’s guess, you can use various online calculators. Calculate now using the online conception calendar.

But at the same time, it is worth remembering that calculating the exact date of birth is unrealistic. Only a small percentage of women give birth at the time prescribed by their gynecologist. After all, a child can be born either at 38 weeks or at 42. And this will be considered completely normal and not out of bounds. But it’s still better to know at least approximately when the baby can be born and start preparing in advance for his arrival.

If you want to know how to calculate your due date, then here you will find answers to all your questions about this. You can calculate the due date based on the date of conception, as well as the last menstrual period. If you have access to the Internet, then you can calculate the moment of the birth of your child online completely free of charge.

If you don’t really trust the online calculator, you can calculate the approximate due date yourself, guided by special formulas. We will also talk about them in this article. The exact date of birth is difficult to calculate, since the child himself decides when to be born. So, let's talk about everything in order. How can the due date be calculated so that it exactly coincides with the birth of the child in the future?

Due date calculator

Determining the due date: What methods are there to determine the approximate due date?

So you took a pregnancy test and it came out positive. Now we calculate the moment the child is born. The date of birth is calculated differently. There are several ways. We will talk about all of them. Let's first list the possible options for calculating the approximate date of birth. Here they are:

1. you can determine the date of birth both online and without the Internet by the date of conception;
2. You can calculate your due date based on your last menstrual period.

Both of these methods can be used together. They don't exclude each other. The most correct option for calculating and calculating the upcoming birth and gestational age in weeks, as well as the size of the fetus, is, of course, ultrasound diagnostics. With its help, gynecologists determine the most accurate moment of the birth of a child. He will also determine whether you can give birth yourself or whether you will need to have a cesarean section if the size of the fetus is large or the baby is lying incorrectly. He will explain who assigns and pays a woman child care benefits during maternity leave (the employer or the Social Insurance Fund). But we will talk about those methods for determining the due date and gestational age for which you do not need to leave the house or even get up from your favorite sofa. After all, you can find out everything using the Internet.

How to calculate childbirth based on the date of conception?

To calculate the expected moment of birth of a baby by the date of conception and determine the gestational age in weeks, you need to have a regular menstrual cycle and know when ovulation occurred. After all, conception is possible only during ovulation. Well, we’re not even talking about the fact that you still need to remember the day on which you were intimate with your loved one. It's obvious. If, suppose, most women have menstruation for 28 days, then ovulation, as a rule, occurs on days 14-15.

But it is worth noting that conception of the fetus may not have occurred on the day of sexual intercourse. It has been noticed that sperm can live even 3 days, while “walking” inside a woman. Therefore, here the approximate moment of birth of the fetus based on the date of conception will be determined approximately, and not day by day. The error can be even one or two weeks. So, now you need to add 280 days to the day of conception (this is exactly how long pregnancy lasts on average for most women). So you will calculate and determine the due date by conception and the gestational age in weeks. It's quite simple if you have a regular menstrual cycle and good memory.

If you don’t want to bother yourself and want to immediately determine the day of your birth by conception and the gestational age in weeks, then use a special calculator on our website. Here you just need to enter the expected day of ovulation into the table and click the “Calculate” button. The computer will calculate and display the gestational age in weeks and the due date. As a result, you will know when the baby will appear and you will look forward to this day and will no longer look for the answer to the question “How can you determine the date of birth by conception?” This is a kind of fascinating fortune-telling that gives a correct prediction.

How to calculate the exact date of birth based on menstruation and find out what week of pregnancy you are in?

To make a calculation and find out the most accurate date of birth based on your period, that is, to find out when you will give birth, you should also have a regular menstrual cycle. The formula for calculating the moment of birth of a child based on the last menstruation of a pregnant woman is used in their practice by all gynecologists. They will certainly ask the expectant mother who came to see them about the first day of her last menstruation. There are probably no such pregnant women whose gynecologists were not interested in the first day of their last menstruation.

So, let’s calculate the approximate birthday of your child and find out how to determine the date of birth based on the last menstrual cycle (its first day). In order to start calculating the preliminary day of birth, you need to count three months ago from the first day of the last menstruation, and then add seven days. This is how the approximate day of birth of the child is obtained.

If you don’t want to count in your head, you can calculate the moment of the baby’s birth using an online calculator, which, after entering the data, will automatically give you the due date and what week you are in. To do this, simply enter the first day of your last menstrual cycle in the special calculator window, as well as the average duration of menstruation and the duration of the luteal phase (for most women it lasts two weeks, that is, 14 days). Next, click the “Calculate” button and wait for the results of the online test. Almost every woman used such a calculator. It is popular nowadays.

Now you know how to calculate your due date, a calculator will always help with this. And also, finding out the duration of your pregnancy in weeks and even days is now not a problem for you either. We hope that you will make the calculation correctly and without much difficulty and with great pleasure, and in the future you will make sure that the actual day of birth of the child coincides with the one given by the calculator! In the future, the question “How to determine the due date online” will not arise for you. Read about how to determine the due date by ultrasound and fetal movements, as well as how to bring the due date closer and get pregnant using IVF in other articles on our website.

Pregnancy is the most important stage in the life of any mother. The health of the unborn baby depends on preparation for it and its course. To determine the exact duration of pregnancy and childbirth, the date of fertilization is important. There are several ways to determine the date of conception, all that remains is to choose the most optimal one.

It is well known that a woman can become pregnant only during the ovulatory period. Directly at these hours, a female cell ready for conception leaves the ovary in the direction of the uterus. The lifespan of an egg is short and rarely exceeds 36 hours, so the chances of spouses conceiving a child during one cycle are negligible. When sperm penetrate the vagina, under the most favorable conditions, a tiny part of them can live there for about a week. That is why the process of conception can occur several days before and on the day of ovulation. How to determine the day of fertilization?

During one sexual act, about 500 million sperm enter the vagina, which modestly accumulate at the posterior vaginal wall next to the cervix. For conception to occur, sperm must reach a mature egg in order to properly fertilize it. To do this, the sperm has a rather difficult path ahead:

• First it passes 2 cm of the cervical canal;
• Then overcomes 5 cm of the uterine cavity;
• Then his task involves crossing 12 cm of the fallopian tube.

Only after passing the cherished 19 cm does the sperm reach the meeting place - the ampullary section, where the “date” with the egg takes place. It takes the sperm about three hours to overcome this path, and the female body resists this process in every possible way. In fact, the vagina is an aggressive environment for sperm, in which most of them die. While in the vaginal environment, the sperm dies after 2 hours. Therefore, a sufficient number of viable and active sperm is important for fertilization.

Process Features

Many of the sperm cannot reach the egg, becoming entangled in the epithelial layer of the fallopian tubes. But they can wait here for the release of the egg, since they are able to live here for about 5 more days. At the same time, at the meeting point of the sperm and egg, conditions favorable for fertilization are created at 37°C. But getting to the egg is not enough; you still need to break through its defenses. This is also taken into account by nature, therefore, in the head of each sperm there is a specific enzyme, which dissolves the membrane membrane of the egg. When one sperm manages to fertilize a female cell, the composition of its shell changes so that no more sperm can get inside and die within 48 hours.

The egg enters the uterus approximately on the fourth day after fertilization has occurred. It takes another three days for attachment, after which conception can be considered accomplished. It is at this time that human chorionic gonadotropin begins to actively enter the blood, which is determined by express pregnancy tests.

When did conception take place?

To determine the day of conception, you need to accurately calculate the ovulatory period, then compare it with the date on which unprotected sexual intercourse occurred. Typically, conception occurs in the middle of the female cycle. Therefore, if the cycle of menstruation is 28 days, you need to count 14 days from their beginning. During this period, the ovulatory process and conception occur. When making calculations, it is necessary to take into account that sperm can fertilize a female cell only within one and a half days, but the vitality of sperm can last up to 5 days (for some, up to a week). Therefore, even knowing the date of sexual contact that occurred, you should not expect that it will coincide in date with conception.

There are two types of gestation periods - true or obstetric. The true or specific period is counted from the ovulatory period and the moment of fertilization. It usually lags behind the obstetric one by about half a month. The obstetric period can be calculated based on and comparing certain factors such as the beginning of maturation of the female reproductive cell, the formation of the fertilized egg and the formation of the fetus. This calculation starts from the date of your last menstrual bleeding.

Proven methods for calculating dates

There are other proven methods for determining conception. At a gynecological appointment, after confirming the fact of pregnancy, the obstetrician asks each woman in detail when her last period began, the duration of the cycle and other information of this kind. Some doctors, in order to determine the exact date of conception, rely on the period of menstrual delay, although the main starting point is still the day the period begins. Therefore, women are recommended to keep a women's calendar, in which all information regarding the beginning and end of menstruation must be entered. There are several proven options for finding out the date of conception.

1. With the help of a gynecologist. This period and date of fertilization will be very relative; in order to more accurately determine the date of conception of the child, additional examinations and medical calculations must be carried out.
2. Calculate the due date using the last monthly period. This is a fairly common technique, but it is applicable only in the case when the cycle is always the same, does not float or get confused, and your period always comes on a certain day. In cases where the cycle is constantly shifting to decreasing or increasing days, it will be quite difficult to calculate when exactly delivery will occur.
3. When registering, each woman is sent for ultrasound diagnostics, where the date of conception and gestation period are determined. The ultrasound method is the most reliable, but such a study can only show the presence of pregnancy at 5-7 weeks, and not earlier. But you can find out when the baby is due to be born using ultrasound diagnostics in the period of 9-16 weeks. If the fetus develops abnormally (too large or small), then the ultrasound may give erroneous calculations.

These methods are used by gynecologists to identify the exact day of conception and determine the timing of fetal development. In the process of calculations, it is necessary to take into account the individual characteristics of the mother’s body, the presence of possible deviations in fetal development, etc. Also, one should not discount the fact that the newborn will show activity to be born a little earlier than the calculated period, or, conversely, will linger in the mother’s womb for a while longer for a week.

Calculator

So, in order to determine when conception occurred, it is necessary to have information about two dates: the first day of the last menstruation and the days when there were sexual intercourse without contraception. It is recommended to write down these dates, because, as practice shows, they are forgotten quite quickly, and already at a gynecological appointment it is difficult for a woman to remember when the last bleeding occurred. How to find out the desired date, knowing the above numbers?

Normally, the duration of gestation is 280 days from the date of conception. This is 10 months or 40 weeks. So, you know the start date of your last period. You need to add exactly 40 weeks to this number. The resulting result will be the number when the baby is expected to arrive.

If you need to determine the date of conception of a child, then everything is simple here too. Ovulation occurs in the middle of the menstrual cycle. If it lasts 30 days, fertilization will occur on day 15-16. It is a mistake to say that the egg is fertilized on the day of sexual intercourse. Sometimes several days pass between sex and conception, which depends on the degree of maturation of the egg, viability and motility of sperm.

What does knowing the date give?

Knowing when conception occurred is important in order to calculate the time of delivery. In addition, such information will help monitor fetal development. Specific changes occur with the fetus every week; in order to find out whether this is the norm or a deviation, it is necessary to reliably determine the gestation period. This will help monitor the processes of growth and development of the fetus, determine whether the pregnancy is proceeding favorably, etc.

In addition, knowing the exact day of conception, you can find out the exact date of birth, determine the time of the mother’s maternity leave, etc.

Conception period

It has already been noted that even with the exact date of sexual intercourse that led to pregnancy, this day cannot be considered with absolute certainty as the date of conception. Since sperm can reach the female cell for several days, conception can be determined by several days covering the ovulatory period. When patients are interested in how to determine the dates of conception, doctors usually say that conception can take place after sexual intercourse that occurred a few days before the ovulatory period and a couple of days after its end.

In obstetric practice, it is quite rare for births to occur at the appointed time, because a newborn may be born not at 40, but at 42 or 38 weeks, which is not a deviation. Therefore, the preliminary date of birth should be treated as an approximate guideline.