What does the day of conception mean? How to calculate the exact date of birth based on menstruation and find out what week of pregnancy you are in? How to determine the gestational age based on the date of conception

The preliminary date of birth can be calculated based on the date of the last menstruation or the date of conception of the baby. When a woman finds out that she is in an interesting position, she strives to find out more information. It is important for her to know how to calculate the gender of the child and expected date of birth.

In order to calculate the expected date of birth, you can now use the following principles:

Examination and doctor's report;
Personal calculations;
Online calculator.

How to determine the gestational age based on the date of conception

If a girl knows exactly when she was fertilized, then it will not be difficult for her to draw up a calendar for the weeks of pregnancy and calculate the date when her baby should be born. Basically all couples have problems with this. And they are connected with the fact that what partners don't miss not a single favorable moment if they decided to join the family. If you have a problem and you cannot calculate the due date of the baby based on the date of conception, then you can try to determine it yourself. It's not as difficult as it seems at first glance.

You just need to remember how in the female body the process of childbirth takes place.

After menstruation, bubbles form in a woman's ovary. They are ahead of each other in speed of development and growth. It is in it that the female cell appears. The remaining follicles disappear over time.
When a cell is at its peak of development, it is ready to function. After this, it breaks through the follicle and is released from it. She moves towards the uterus. Under favorable conditions, the sexual tract occurs t fertilization by sperm. It is this moment that you will need to know in order to calculate the estimated time of birth based on the date of conception.
The cell that has been fertilized continues on its way and implantation into the uterus completes it. This happens only a week after the female cell meets the male one.
If the fertilized cell is well established in the uterus, then it begins to grow and develop. This process is facilitated by progesterone produced by the corpus luteum. It acts as a temporary gland that grows on the wound that was formed from the rupture of the vesicle. It always appears, but if fertilization does not occur, by the day of the next menstruation it is structurally destroyed, leaving a small scar on the ovary.
Under the influence of progesterone, changes occur in the structure of the mammary gland. There are signs of an interesting situation, due to which woman starts looking ways to calculate the due date, how to create a calendar using a calculator, when to visit a gynecologist and what tests she will need to undergo.

Ovulation and timing of conception

To calculate the expected date of birth and create a calendar, you need to determine the day on which your egg was fertilized. How to do this during regular sexual intercourse ? First you should remember that conception can only occur when the cell is released from the follicle membrane and enters the sexual tract. It will be very easy to calculate the due date based on the date of ovulation. Usually this process takes no more than a day, so the error in calculations is practically zero.

How to calculate the due date using the last menstrual period

If the day ovulation unknown to girl, then it can be calculated based on the readings of your menstrual cycle.

The following parameters become the data for calculation:

Characteristics and duration of menstruation. Every month they should be the same in duration, structure and abundance.
Systematicity. It is necessary to compare the obtained figures with each other. The maximum deviation normally should not exceed 24 hours. In this case, there will be no problems when calculating the exact date of birth. But there are failures and shifts for 7 - 14 days. They can be caused by climate change, taking hormone-containing drugs, illness, stress and other factors. At violation of cyclicity, when the timing differs by 5 or more days, the rhythm is considered irregular. There's nothing wrong with that. But conception and childbirth will be a little more difficult to calculate.
Cycle duration. You need to count how many days have passed between periods over the past few months. Normally, the cycle should be 28 days, but there are cases when the cycle lasts 21 – 33 days.

Ovulation in the menstrual cycle

The day of ovulation is calculated in the case when it is necessary to determine the date of birth based on menstruation. To do this, you need to know the duration of the phases occurring in the female body:

The time of cell and follicle generation is from 11 to 17 days. These indicators differ due to the different content of hormones and their balance in the body. The norm is 2 weeks. But this is possible only in the case of a constant cycle over a long period of time, which is equal to 28 days.
Release of the cell and its path to the uterus. If on this path he and will not meet a sperm, but its lifetime is no more than 24 hours. Very rarely it can live up to 3 days, but, as a rule, it dies within 12 hours.
In the absence of a fetus, the functioning of the corpus luteum ends exactly after 2 weeks. This figure is equal for all women. In rare cases it is 12 or 13 days.

The last number is known exactly and is the same for all girls. It is because of this that ovulation is counted by it.

The calculation formula is as follows: subtract 14 days from the duration monthly process. Count the result you get from your last menstruation and mark this date on the calendar. This number is ovulation, which is the period of conception. On other days, due to the fact that there is no ready-made cell, this is not possible.

How can you determine the yield of a cell?

There are several ways to find out when a mature cell has emerged:

Pain. Unpleasant sensations are felt on the side of the ovary. When a cell ruptures a follicle, it creates a small wound on it, which causes pain. By remembering the exact date when the pain appeared, it will be easy for you to conceive calculate due date.
Discharge. During the development of the follicle, vaginal mucus has a thick structure and does not leak out. And at the moment of cell birth, it liquefies and is released abundantly. It resembles egg white in color and structure. It is released until the cell dies.
Microscope. This is a reusable device that allows you to see the pattern of salts in your saliva. It gradually changes, acquiring the features of a fern by the day the cell appears. Based on the day when this image appeared more clearly, you can calculate the date of birth.
Test. Use the strip according to the instructions and watch the color change of the reagent. It will show you the concentration of luteinizing hormone, which reaches a maximum when the follicle ruptures.

Determining the date of conception of the baby

It is customary to count the gestational age from the first day of the last menstruation. In the same way, you can calculate the date of conception and the approximate due date.

Obstetricians and gynecologists advise determining the day of conception using the following formula: add 280 days or 40 weeks to the first day of the last menstrual period, minus 14 days for ovulation.

Due date calculator

The online calculator works well to calculate the expected birth date of the baby by week. It already contains all the formulas and algorithms.

Calculation based on last menstruation or day of conception

You can enter one of the following indicators for calculation into the online calculator:

The moment of conception. From the day that is known to the girl, the calculator will count the number of days required for pregnancy.
Date of last menstruation. You need to know the length of the cycle, because the calculator determines the day of birth from the moment the cell appears. If the girl doesn’t know him exactly, then you can write 28 days, but keep in mind that because of this, there may be a slight discrepancy in the date.
You can calculate your expected due date based on ovulation. The first method is used for calculation, because conception and ovulation occur on the same day.

What is a pregnancy calendar and its functions

Using a calendar and a calculator to calculate the duration of pregnancy, a woman receives a certain number of interest to her. But that's not all. Almost all pregnancy calendars have a table indicating the weeks and describing the following information:

Fetal development. Due to constant development, the embryo definitely changes. You can find out exactly at what period his internal organs are formed, muscle connections increase, and when he begins to hear what is happening around him.
Medical indications. Based on the characteristics of the body, the baby at each stage of formation requires a certain amount of microorganisms and nutrients. A woman will also be able to find out when to expect heartburn, discomfort and toxicosis. And also how to protect yourself from them without harming your baby.

The doctor determines the due date

Many women are sure that only the gynecologist who sees her can calculate the exact due date. But it must be remembered that his conclusion is based only on the words and testimony of the patient. If the gynecologist did not see you before pregnancy, he will ask you to answer the following questions:

The presence of deviations and disruptions in rhythms;
Systematicity;
Cycle duration;
First day of menstruation.

It is on the basis of these readings that he will make his calculations and give you a number that will most likely coincide with the one you calculate online based on the date of conception. There may be an error due to the inaccuracy of the woman’s testimony.

How accurate are ultrasound readings in determining the gestational age?

If a specialist wants to determine the exact date of birth using an ultrasound examination, then the online calculator will be at a disadvantage in this case. This is due to the fact that during an ultrasound examination, a specialist can see and compare the size of the embryo with the norm. But you should not rely on this deadline. Each organism has its own developmental characteristics, so embryos at the same period may differ from each other.

When a woman plans to get pregnant and give birth to a baby, she dreams of seeing the coveted “two lines” on the test, but how to determine the day favorable for conceiving a child?

It’s worth saying right away that you won’t be able to establish the 100% exact date of conception of the baby before the day, but you can determine the day of ovulation in order to plan a pregnancy, and then wait for signs of pregnancy or test results. How to find out the exact day of ovulation in order to plan a pregnancy with a high probability? Let's figure out together how to determine the day of conception of a child!

When you want to find out what are the most favorable and most likely days for conceiving a child, you will need to calculate the day of ovulation as accurately as possible. Today there are a large number of ways to establish this point:

The simplest and most common way to “calculate” ovulation is by basal temperature. Ovulation will occur after the temperature drop, which is observed 24 hours before the release of the egg from the follicle. Here we can note a decrease in basal temperature by 0.1-0.2 degrees. When ovulation occurs, the basal temperature rises by 0.2-0.5 degrees and exceeds 37 degrees.
According to ovulatory syndrome. There are women who, during the period of ovulation, experience nagging pain in the area of the active ovary, which is quite sensitive and noticeable. Therefore, some women experience short-term malaise and discomfort during ovulation.
According to the nature of the mucus that is released from the vagina. If in the first phase of the cycle the vaginal mucus is thick and sticky, then before the egg begins to ovulate, it becomes transparent and viscous and resembles the white of a chicken egg. In some cases, the release of an egg ready for fertilization from the follicle is associated with damage to the blood vessels, so a woman notices small bloody impurities in the vaginal discharge in the middle of the cycle.
Using the folliculometry method. In this case, ultrasound is used to monitor how the egg matures. This method allows you to accurately calculate the day when the egg ovulates.
Using a special ovulation test. Many modern women are aware of what a pregnancy test is and have used it. So, the ovulation test works on a similar principle, but the reaction occurs to an increase in the concentration of LH - luteinizing hormone, the so-called fertility hormone.

A visit to a gynecologist will also help resolve this issue, since the doctor, during an examination on the chair, can quite accurately determine the approaching ovulation. If you want to accurately calculate this day, you can use several of the above methods at the same time.

To conceive a child, nature “gives” several days

Even if you know exactly when the last sexual intercourse occurred, after which the long-awaited pregnancy occurred, it is impossible to say that this particular day is the date when the child was conceived. As you know, sperm can take several days to reach the egg, and one day may not be enough for fertilization. In addition, the sperm that arrives at the “meeting field” may be left out of work, since the egg has not yet left the follicle.

It happens that sperm are "waiting for ovulation by being nearby." Experts say that, from a theoretical point of view, conception of a baby can occur from sexual intercourse that occurs both a few days before ovulation and a couple of days after it occurs.

Having discovered the signs or learned the results of a pregnancy test, a woman is in seventh heaven, because now the unforgettable time of bearing a child begins, filled with the special meaning of the speedy birth of the baby. The importance of pregnancy in a woman’s life is difficult to overestimate, but it often happens that the expectant mother did not keep track of the moment of conception, and now wants to find out when this wonderful event happened, keep in mind, calculating and finding out the day of conception with an accuracy of the day is not so and easy.

It is almost impossible to calculate the exact date when the child was conceived if the pregnancy has already been confirmed. Of course, if you have an irregular sex life and you remember exactly the dates of sexual intercourse, then it is possible to determine this moment with day-to-day accuracy. But there will not be a 100 percent probability due to the fact that conception is possible only during the period when the egg has ovulated. Few women in the same period of the cycle spend time calculating ovulation over several months in order to make a rough prediction on which days it will happen.

If a woman kept an ovulation calendar, that is, she regularly tracked the moments when an egg was released from the ovary into the fallopian tube as a result of the rupture of a mature follicle, then she can know the dates when ovulation occurred quite accurately and ultimately find out the day of conception. It is necessary to subtract two weeks from the date on which the first day of menstruation is expected to occur, that is, 14 days. It is generally accepted that ovulation occurs, if we take the average value, 14 days before the start of the next menstruation. If you have a standard cycle of 28 days, then ovulation actually occurs on the 14th day of the cycle. If the cycle is longer and is 31 days, then on the 17th day, and when it is 25 days, then on the 11th day, but all the same, such calculations are considered conditional. The secret is that the ovulation process is associated with many factors that cannot be predicted when calculating the approximate date of conception.

To determine a more accurate date of conception, you can go for an ultrasound examination of the fetus, and there, after conducting the examination, a specialist doctor will be able to tell you the approximate gestational age, although this date also cannot be considered 100% accurate.

Every woman, having learned that she will soon become a mother, wants to understand when the first meeting with the baby will take place. To do this, you need to find out the gestational age; you can calculate it in several ways.

But even the most accurate calculations will only give, because not every pregnancy lasts exactly 40 weeks. The approximate dates are set by the doctor upon registration and can be slightly adjusted within 9 months.

Methods for determining gestational age

You can calculate the gestational age in different ways. Each has its own pros and cons. Some calculations are easy to do at home yourself, armed with a calendar, while other methods for determining the date require the help of a doctor and medical equipment.

By date of ovulation (conception)

This calculation method is the most accurate, especially in the early stages. Conception can occur only during a period that lasts several hours, and over the next 24 hours, while the egg remains in the fallopian tube. If sperm enter the uterus later, fertilization is no longer possible.

There are three ways to determine the day on which ovulation occurred:

Calendar . Most often, menstruation begins exactly 2 weeks after ovulation. Knowing the duration, you can calculate the day when the egg left the ovary and was in the fallopian tube - the period of conception. For example, if 30 days pass from the beginning of one period to the beginning of another, then the calculation of ovulation will be as follows: 30-14 = 16 (conception occurred on the 16-17th day of the cycle). But this method turns out to be unsuitable in cases where ovulation or, that is, occurs not after 14 days, but after 10-13 or 15-18. Such a calculation will also not be possible for women with.
. The principle of this test is based on detecting high levels of luteinizing hormone in urine or saliva. Its amount varies throughout the cycle and reaches a maximum on the eve of ovulation. When the test gives a result, it means that conception can occur in the next 24-48 hours. In pharmacies you can buy drugs that react to the concentration of luteinizing hormone in saliva. They are designed for one or more applications. A more common option is strip strips that determine the level of LH in urine.
Schedule . This method requires long-term measurement of temperature in the rectum. The procedure should be done in the morning, without getting out of bed. Record all data daily. Ovulation on the graph will be determined by a sharp increase in values by 0.4-0.6 degrees. In the first half of the cycle, it is no more than 37°C; on the day the egg is released from the ovary, it increases and remains at approximately the same level until the onset of the next menstruation. The disadvantage of this method is that such changes may not be caused by ovulation, but, for example, by recent sexual intercourse or an incipient cold.

Do not confuse the day of sexual intercourse and the day of conception. Fertilization of the egg is possible within 24-36 hours after ovulation. Sperm entering a woman’s body can remain alive for up to 7 days. That is, within a week (usually 3-5 days) after sexual intercourse, conception can occur.

By start date of the menstrual cycle

This is how the obstetric gestational age is calculated. It does not take into account exactly what day conception occurred and the development of the embryo began. Therefore, it is not entirely accurate; the error can range from 7 to 14 days.

How to calculate the gestational age based on the last menstruation? First you need to remember when they started. For further calculations, it is better to prepare a calendar. It is necessary to determine the number of days from the first day of the last menstrual bleeding to today. This will be the obstetric period of pregnancy.

You can find out the expected time of birth of a child in the following ways:

Count 40 weeks from the start of your last period.
From the beginning of the last menstruation, subtract (count back) 3 months, and then add 1 week. Move this calendar date forward a year.

For example, a woman’s last period began on October 20, 2016. According to method 1, we add 40 weeks, and the expected date of birth is July 27, 2017. We calculate in 2 ways: October 20 minus 3 months - July 20, plus 1 week - July 27. The dates match, both calculations are correct.

This method of calculation turns out to be the most accurate for women with a 28-day menstrual cycle. How to make it easier - an online calculator will help you correctly calculate the gestational age, but again only for the reference cycle. In other cases, a doctor will be able to confirm the date more reliably.

By date of first movement

The method of determining the date of birth by the first movement has been used for more than 100 years. It was very relevant at a time when medical technology and knowledge were not developed. Now doctors do not use it, since other methods can calculate the gestational age in weeks more accurately.

It is believed that the first movement occurs exactly in the middle of pregnancy. Based on this, you can calculate the expected date of birth. Embryonic development of the fetus lasts 38 weeks. This means that by the day when the woman felt the first tremors, you need to add 19 weeks - this will be the expected date of birth. And if we subtract the same period of time, we get the date of conception.

But the error of such a calculation is very large:

With the help of modern medical equipment, it has been established that the baby can begin to move as early as 12 weeks of pregnancy, but women feel it later.
Most often, women who will give birth for the first time begin to feel the baby’s movements at 20 weeks, and those who already have children, earlier - at 18. It turns out that the calculations for the date of birth will be as follows: we add 18 weeks to the day of the first movement (for those who is having their first pregnancy) or 20 weeks (for repeat pregnancies).
All women have different sensitivity. According to the observations of doctors, thin women who lead a sedentary lifestyle are the first to detect movements. They celebrate them as early as 14 weeks of pregnancy.

Considering that the pregnancy itself can last from 38 to 42 weeks, the error in this calculation becomes even greater. Doctors mark the day of the first movement in the chart, but it is not used to adjust the expected date of birth.

Based on uterine measurements

From a certain period, namely from the 6th month, the height of the uterine fundus in centimeters corresponds to the number of weeks of gestation. Therefore, by measuring this parameter, you can calculate the approximate date of birth and gestational age.

The height of the fundus of the uterus is the distance from its upper edge to the symphysis pubis. The gynecologist measures it from 14-16 weeks; before this period it is located behind the pubic bone, and its size can only be determined by a vaginal examination.

The only tools you need are a measuring tape. You need to lie on your back, after emptying your bladder. Free the abdomen from clothing and carefully palpate it along the lobar line: in the place where the elastic abdomen becomes soft, the fundus of the uterus (its upper border) is located. You need to measure from this point to the symphysis pubis.

To make it easier to find the upper border of the uterus, you can focus on standard indicators:

at 12 weeks it reaches the upper edge of the pubic bone, the size of the entire uterus is comparable to the size of the newborn baby’s head, it cannot yet be felt and measured;
at 16 weeks - located 6 cm from the symphysis pubis, you need to feel the distance from the navel to the pubic bone;
20 - 12 cm above the pubis, determined approximately 2 fingers below the navel;
on 24 - palpable 22-24 cm from the pubis, just in the navel area;
28 – 27-29 cm, this is about 2-3 fingers above the navel;
at 32 – set 31-33 cm from the womb, palpated between the navel and the beginning of the sternum approximately in the middle;
at 36 – 35-37 cm, determined at the level of the beginning of the sternum;
at 40 weeks, the baby places its head in the pelvic bones, and the uterus drops slightly, the height of its bottom is 32-33 cm, palpable between the navel and the beginning of the sternum.

How to calculate what the exact stage of pregnancy is now and when birth will occur, knowing the height of the uterine fundus? This can be done when the indicator reaches 24 cm. From this period, the number of weeks of pregnancy is the same (24 or more). Considering that the entire pregnancy lasts 40 weeks, the calculations are easy to do.

The accuracy of this method is low, so at present it is practically not used. But these measurements are still carried out, their purpose is to identify possible complications. If the height of the uterine fundus does not correspond to the duration of pregnancy, this may be a sign of hydatidiform mole, tumor and other pathologies.

Ultrasound

Ultrasound can be performed in the early stages. Already from 3-5 weeks, the fertilized egg begins to be visualized; determining its location helps to exclude it, and its diameter helps to determine the period.

At 5-6 weeks the embryo itself is examined, the doctor measures the coccygeal-parietal size (). There are standard values for this indicator for certain periods. By comparison, the gestational age and the approximate date of birth are calculated.

In the 2nd and 3rd trimesters, the following indicators are measured during ultrasound:

biparietal size - the segment between the parietal tubercles;
circumference of the head, chest and abdomen;
thigh bone length.

There are also standards for all these values. By comparing the measurement values, the gestational age can be calculated and the due date can be predicted. But as individual differences become more apparent with each passing week, the potential for error increases. The size of the fetus is reflected in the mother's diseases, hereditary factors, and characteristics of the course of pregnancy. Therefore, by the end of gestation, the child can weigh 2700 grams or 4500 - both options will be the norm.

So, determining the duration of pregnancy and date of birth using ultrasound will be accurate up to 12 weeks. The more time has passed since this period, the less reliable the results will be.

According to hCG level

Human chorionic gonadotropin is a hormone that is produced by the membranes from the 6th day after conception. The first weeks there is a rapid increase in its concentration in the blood: doubling every 2 days. Then its production gradually decreases, and from 9-11 weeks the indicators begin to decrease.

You can find out the concentration of hCG in the blood by submitting it for laboratory analysis. There are certain norms for the content of this hormone in plasma for a certain period of pregnancy. Each laboratory uses its own reagents, the sensitivity of which varies. Therefore, there is no single table of standard values.

The method of determining the duration of pregnancy by the level of hCG in the blood is practically not used, although it is quite accurate, especially in the early stages. The analysis is carried out to identify pathologies, for example, or implantation of an embryo outside the uterine cavity.

What difficulties might arise?

No matter how accurate the methods for calculating the timing of pregnancy are, they all only give an approximate date of birth. It is impossible to say with a 100% guarantee when the baby will be born.

According to statistics, 17% of pregnant women give birth on the day predicted by doctors, and the remaining majority give birth earlier or later. It turns out that even the most qualified specialists and high-tech equipment are not able to perform absolutely accurate calculations.

Labor is considered normal if it begins between 38 and 42 weeks of pregnancy. In these cases, the fetus is considered full-term. With some complications, labor begins. The cause may be pathology of the child’s development, stressful situations, various disorders in the mother’s body, and hereditary factors. All this must be taken into account when calculating the gestational age.

The child is often observed with, in the case of taking hormonal drugs, with impaired ovarian function. The hereditary factor also influences: if there have been late births in the female line, then it is likely that they will recur.

The menstrual cycle and ovulation are physiological processes. The length of the cycle ranges from 24 to 35 days. Therefore, any calculations based on them will always have a certain amount of error.

Standard calculations are based on the assumption that pregnancy lasts 40 weeks, and this is only true for a 28-day cycle. The time of ovulation is also determined by static data: 14 days before the start of menstruation. In fact, this process can happen 3-4 days earlier or later.

You can calculate the gestational age in different ways. The most accurate determinations are by the date of conception (ovulation), by the last day of menstruation and by ultrasound data for up to 12 weeks. Other methods can be considered auxiliary; they allow a large degree of error and are not used in medical practice for this purpose.

Even the most accurate method can be off by 1-2 weeks, or even more. This is due to the fact that the duration of gestation ranges from 38 to 42 weeks (normal), the menstrual cycle - from 24 to 35 days, the onset of ovulation can also occur several days earlier or later than expected in standard calculations.

Useful video on how to calculate gestational age and due date

I like!

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

The birth of a new life has been considered a sacrament since ancient times. Some still decide that it is not worth interfering in the affairs of God, while others are trying to determine the day of conception, since there may be various reasons for this.

How to determine the date of fertilization?

The simplest and oldest method of determining the day a child is conceived is the method. To do this, it is enough to know the exact number of days in the menstrual cycle and subtract the duration of the luteal phase from this figure. This is the period when ovulation occurs, the meeting of the sperm with the egg, its implantation into the walls of the uterus and further development. In 90% of cases it lasts 14 days.

For example, consider a cycle that consists of 29 days: 29 – 14 = 15. So, ovulation occurred on the 15th day of the menstrual cycle. This means that fertilization occurred on that day or the next, because A female egg lives no more than 48 hours. To the question whether it is possible to determine the day of conception using this method, for girls whose menstruation is irregular, the answer will be negative, because It is not possible to find out the exact number of days in the cycle when conception occurred.

Is it possible to determine the day of conception using an ultrasound scan? This is one of the difficult questions. Ultrasound examination is more aimed at studying the development of the fetus at the appropriate time. The doctor will examine the baby and, based on the information received and the date of the last menstruation, will diagnose pregnancy. In order to calculate the date of expected ovulation, and therefore conception, based on these data, it is enough to subtract two weeks from it.

So, it is possible to determine the exact date of conception, but it should be remembered that there is almost always an error and, as a rule, it ranges from 2-3 days to a week. The ultrasound method is also not 100% reliable, although the opinion of a specialist in this field may play a certain role in confirming the date calculated by the calendar method.