Today, there are many ways to determine the timing of pregnancy and due date.

How to determine the gestational age

So, if by making a pregnancy test or visiting a gynecologist, you are convinced that you are really pregnant, then you can calculate the gestational age by the date of the last menstruation. Consider the fact that you need to count from the first day of your last period. Take a calendar in your hands and count how many weeks have passed since the first day of your last menstrual period - this will be the gestational age.

How to determine your due date by your last menstrual period

In order to find out the due date, use the Negel formula. From the first day of the last menstruation, they count 3 months ago and add 7 days.

You can also add 280 days to the first day of the last menstruation, that is, 10 lunar months - this will be the due date. When calculating, do not forget that one lunar month is equal to 28 days, that is, 4 weeks. But more often in obstetric practice, for convenience, the Negel formula is used.

You should be aware that the above method can only be used in women with a regular menstrual cycle. If the cycle is irregular, then there may be errors in the calculations.

Below is a table that will help you quickly calculate your expected due date by the date of your last menstrual period.

It is necessary to find the date of the 1st day of the last menstruation in the red line of the table. The number in the yellow line of the table under the found date indicates the probable day of birth.

For example: the date of your period is January 11, the probable day of birth is October 18. The date of your period is June 13, the likely day of birth is March 20.

Determining the gestational age and due date by the date of ovulation

You can also calculate the gestational age by the date of ovulation. As you know, ovulation occurs in the middle of the menstrual cycle (approximately 12-16 days of the cycle, if you count from the 1st day of menstruation). It is during this period that conception occurs. From this moment, the gestational age is counted, adding 2 weeks. That is, if ovulation or conception occurred on March 14-15, then the gestational age should be counted from March 1-2.

To determine the date of birth by ovulation, it is necessary to subtract 3 months and 7 days from the date of ovulation / conception. Or you can add 38 weeks to the date of ovulation / conception.

This method is ideal for women who become pregnant artificially using in vitro fertilization (IVF) or insemination with the sperm of a partner. Since artificial insemination is carried out on the days of ovulation, the woman knows exactly the day of conception and it is easier and more accurate for her to calculate the gestational age and the date of birth.

Definition by ultrasound

You can also determine the timing of pregnancy and the date of birth by ultrasound (ultrasound). For this, measurements are taken of the size of the fetus, which correspond to a certain period of pregnancy. The method is more reliable in the first trimester of pregnancy. In the 2nd and 3rd trimester, errors in determining the exact timing of pregnancy are possible, since each fetus has its own constitutional characteristics. In addition, the mother or the fetus may have various pathologies (for example, diabetes mellitus in the mother or fetal malnutrition), which will interfere with the normal growth and development of the fetus or, conversely, contribute to its excessive growth and development.

Other methods for determining gestational age and due date

The gynecologist can determine the gestational age by examining the pregnant woman on the chair. With a vaginal examination, the size of the uterus is determined, which increases gradually during pregnancy.

At a later date, when the uterus is well felt through the abdomen, there is no need to conduct a vaginal examination to determine the duration of pregnancy. To do this, it is enough to measure with a centimeter tape the height of the uterine fundus above the bosom and the volume of the abdomen.

It should be noted that in some cases this method is not always reliable. For example, if a pregnant woman has uterine fibroids, then the uterus will be larger than it should be at the due date. Also, the uterus may be more than normal with polyhydramnios and multiple pregnancies. And, conversely, with fetal malnutrition, low water, undeveloped pregnancy, the size of the uterus will lag behind.

Consider a method for determining the duration of pregnancy and childbirth, which is less commonly used than the above, due to the development of additional research methods. However, this method has its practical value, and serves as a sure sign of the baby's health.

This is the determination of the gestational age by the first movement of the fetus. The future primiparous mother feels the first fetal movement at 20-21 weeks of pregnancy. Multiparous people feel the first fetal movement, starting from 18-19 weeks of pregnancy.

In order to calculate the date of birth, it is necessary to add 5 lunar months to the date of the first movement of the fetus if the upcoming birth is the first. If childbirth is repeated, then 5, 5 lunar months must be added to the date of the first fetal movement.

And finally, some general and useful information regarding the duration of pregnancy.

The average pregnancy lasts 10 lunar months, that is, 40 weeks if you count from the first day of your last menstrual period. Most women give birth at 40 weeks.

But this is not always the case. Normally, a baby can be born between 38 and 42 weeks and will be considered full-term and completely normal. Therefore, initially you need to know that the date of birth cannot be calculated absolutely exactly on the same day. The doctor can only determine the expected date of birth, based on anamnestic data, examination data and additional research methods.

Obstetrician-gynecologist, Ph.D. Christina Frambos

Hello dear readers! Today I propose to talk about a very intimate, but important topic that worries almost every expectant mother - "How to correctly calculate the due date?" The birth of a child is the main event in a woman's life. For example, I was really looking forward to it, and at the same time I was afraid. Then my gynecologist told me several ways that helped me to accurately calculate this date. I will gladly share this information with you. Are you already interested? Then let's start.

Determine the day of birth by the day of conception

Determining the exact date of birth of a child by the date of pregnancy is the most common way that many expectant mothers use. We add 9 months to the estimated date of conception, and you're done! Did you also calculate the time of delivery by this method? I hasten to upset you - these are incorrect calculations! The thing is that the process of bearing a child lasts 280 days, not 9 months.

Your personal ovulation calendar will help determine this important day. The thing is that the moment of fertilization of the egg sometimes does not coincide with the time when the decisive sexual intercourse occurred. Did you know that spermatozoa can live in a woman's body for up to 7 days, and stubbornly "wait" for when fertilization can be carried out?

Most often, it is the day of ovulation that is the day of conception. It is enough to add 280 days to it, and you will know when day "X" comes.

How to correctly calculate the due date

If you were unable to carry out the appropriate calculations by the date of conception, use your personal menstruation calendar to calculate the baby's birthday. Every girl has it. Is not it? Any gynecologist will tell you that the regularity of the menstrual cycle is very important.

Doctors calculate the time of birth using a special Negele formula. This method is suitable only for those girls whose menstrual cycle works like a clock and lasts 28 days. Let's try to use the formula together with a specific example.

The general wording is as follows - from the first day of the cycle, you need to subtract 3 months and add exactly 7 days. For example, my last period started on September 28th. I subtract 3 months from this date - it turns out June 28. Add 7 days, and we get the date - July 5. This is a very simple yet effective way. Believe it or not, the time I calculated exactly coincided with the birthday of my baby.

Ultrasound is the best way to determine the "X" day

Medicine does not stand still. Gradually, new equipment appears, which allows conducting the most accurate studies of the body of a future woman in labor. With the help of an ultrasound examination, the gynecologist can determine the size of the fetus, and from these data establish the PDD (estimated date of birth).

I had different periods for menstruation and ultrasound, so I had to use another method, which I will discuss below.

In order for the survey results to be as accurate and true as possible, you need to perform. If you see your doctor too early, they will not be able to see anything, as the fetus is very small in early pregnancy. The ideal time to determine the PDD by ultrasound is 10-14 weeks.

The main thing is not to miss this moment, since then the baby will begin to actively grow and develop, and his physiological changes will depend solely on the individual characteristics of the organism. If you sign up for the first ultrasound examination in the 2-3 trimester, the gynecologist will not be able to determine the PDD accurately.

The baby moved in the stomach - it's time to calculate the exact due date

Did you know that you can also find out the PDR by the movement of the fetus? It is about this method that I promised to tell you at last. Well, promises must be kept! Of course, this method can be considered rather approximate and imprecise, but it has a place to be. The thing is that a girl who gives birth for the first time feels the fetal movement a little earlier than a mother with experience.

Be sure to remember the day when you first felt that the baby inside you began to move. One of these methods can be used:

• If you will be giving birth for the first time, add 20 weeks to this date;
• A girl who already has children must add 24 weeks to this date.

The method for determining the PDR by the first movements of the fetus is considered the least accurate.

If you had an irregular cycle before conception, be sure to warn your gynecologist about this. A very unpleasant situation happened to my friend during pregnancy. The thing is that her menstrual cycle is not 28, but 40 days. The doctors did not take this fact into account, and calculated the start date of the contractions, which turned out to be incorrect. As a result, “X-day” came, and her labor activity did not begin.

The doctors already wanted to inject drugs for stimulation, but she managed to point out the error in the calculations in time. This is how useful it can be to calculate the time of the baby yourself! Thank God, my friend and her baby are fine. The birth was easy, but she was seriously scared. Now do you understand how important it is to correctly calculate the DA? Your health and the life of your newborn can depend on it.

Well, my dear future mothers! I wish you patience, calmness and good health. There is no need to be afraid of childbirth, and then it will pass quickly and easily. Perhaps you know of other methods for determining the date of birth of a child? Share them in the comments and be sure to visit our blog more often. Many more interesting and useful things are waiting for you.

Estimated due date (PDR) is the day when the gestational age is exactly 40 weeks. Although a full-term pregnancy is considered already upon reaching the full 37 weeks, and in some cases a healthy full-term baby can be born at 42 weeks of gestation, it is still customary to focus on 40 weeks, since most births begin precisely at this time.

The importance of calculation estimated date the birth of a baby is beyond doubt, and the point here is not only the desire of parents to prepare for the appearance of a new family member. The medical side of the matter is also important. Let's list the reasons why the doctor leading the pregnancy needs to know the expected date of birth.

Fetal growth and development... It is important for a doctor who monitors the course of pregnancy to know how much the developing baby corresponds in size to the gestational age (which is calculated based on the expected date of birth) in order to timely diagnose such a serious complication as intrauterine growth retardation (IUGR), which is a consequence of placental insufficiency (pathology , in which the placenta is defective in providing the fetus with everything necessary for growth and development). Timely adequate diagnosis and, consequently, treatment of this complication is of great importance for the further full development of the baby.

Prevention of pregnancy complications... During the observation process, the obstetrician remembers that at various stages of pregnancy, the development of certain complications is possible, in connection with which the timing has been determined in which it is necessary to carry out diagnostic measures to identify complications, their prevention and treatment (for example, prenatal screening - diagnosis congenital malformations of the fetus - should be carried out at clearly defined periods of pregnancy, and if these periods are not observed, its diagnostic value is sharply reduced). With diseases such as diabetes mellitus and hypertension - if the course of the disease worsens or the treatment does not give a positive effect - it may be necessary to deliver before the onset of spontaneous labor. Then the doctor needs to know in order to ensure the maximum possible degree of fetal maturity in this clinical situation.

When to go to the hospital

If there are indications for early hospitalization before delivery, it is important to correctly determine the timing in which the pregnant woman should go to the hospital... Indeed, if hospitalization is too late (for example, on the eve of a planned cesarean section), there is a risk of not having time to carry out the necessary amount of examination and preparation for delivery, and too early hospitalization is not advisable, since a long stay of the expectant mother in the hospital can lead to an increased level of anxiety, stress on the eve childbirth. The timing of prenatal hospitalization for various complications during pregnancy may vary. For example, with diabetes mellitus, a pregnant woman must be hospitalized no later than 36 weeks. With a transverse position of the fetus and placenta previa, the expectant mother should be in a hospital no later than 37 weeks (since during this period the body prepares for childbirth, which is a great danger due to prenatal rupture of amniotic fluid in the case of a transverse position of the fetus and the development of bleeding during presentation placenta). Women with breech presentation and anatomically narrow pelvis are sent for antenatal hospitalization at 38–39 weeks of gestation in order to have time to conduct a full examination, choose a method of delivery, and prevent pregnancy overdue.

How to calculate your due date

For determining expected due date several methods are used.

Obstetric term (by the date of the last menstruation). It is generally accepted to consider the date of the first day of the last menstrual period as the reference date for the menstrual cycle - that is, the complete menstrual cycle is calculated as the interval from the first day of menstruation to the first day of the next menstruation.

For calculation expected due date by the date of menstruation there are two ways:

280 days are added to the date of the first day of the last menstruation (this is the average duration of pregnancy, counting from the date of menstruation).

Formula Negele: from the first day of the last menstruation 3 months are subtracted and 7 days are added. For example, the last menstruation was on May 10 - subtracting 3 months, we get February 10, and adding 7 days, we get February 17 - this will be the estimated date of birth by the date of menstruation (we will assume that on February 17, the gestation period will be a full 40 weeks, and therefore, labor should begin at about this time).

Embryonic term (by date of conception or by ovulation). The probability of pregnancy is highest on the day when ovulation occurs - the process of the release of a mature egg from the ovary. This usually occurs in the middle of the menstrual cycle (for example, if the menstrual cycle is 28 days, then ovulation occurs on the 14th day, and if the cycle is 32 days, then on the 16th day).

Considering that the egg is capable of fertilization within 24 hours after ovulation, and the life expectancy of a sperm is on average 72 hours (in some cases it can reach 4-5 days), the probability of fertilization is not 1 day, but much earlier - starting from 9 -10th day of the menstrual cycle (with a 28-day cycle). This circumstance significantly complicates the determination of the expected due date by the date of conception. It is possible to establish the due date of conception when a woman knows the exact date of ovulation (for example, she monitored the basal temperature or, for medical reasons, ultrasound monitoring of folliculogenesis, the process of egg maturation, was carried out). To determine the PDR, 266 days (since this is the true duration of pregnancy) or 38 weeks are added to the date of conception.

With a regular menstrual cycle (lasting 28 days), there is no difference between calculations by the date of the last menstrual period and the date of conception, therefore it is most convenient and informative to determine by the date of menstruation.

By the date of the first appearance in antenatal clinic... This method of determining the duration of pregnancy and childbirth will be as informative as possible if the expectant mother consults a doctor before 12 weeks of pregnancy. When registering, in order to be sure of the fact of pregnancy and to establish its duration, the doctor will conduct an examination on a gynecological chair to determine the size of the uterus. It begins to increase from 5-6 weeks of pregnancy, acquires a spherical shape. In addition, during pregnancy, the uterus becomes soft (outside pregnancy, the uterus is pear-shaped and dense in consistency).

Determining the size of the uterus during a gynecological examination, the doctor specifies which gestational agecorresponds to an increase in the uterus. For example, at 5-6 weeks, the uterus becomes the size of a hen's egg, at 7-8 weeks - the size of a goose's egg, by 12 weeks it reaches the size of a newborn's head and its bottom (this is the name of the upper part of the uterus) can already be palpated (felt) through the front the abdominal wall without resorting to a vaginal examination. Starting from the second trimester, according to the height of the fundus of the uterus, you can roughly determine the gestational age: by 16 weeks, the bottom of the uterus is in the middle of the distance between the bosom and the navel, by 24 weeks - at the level of the navel.

It is important to remember that the longer the gestation period, the higher the error may be in determining it for this parameter, since the height of the uterine fundus depends on many individual characteristics: the number of births in the anamnesis, the size of the fetus, gynecological diseases (for example, with uterine myoma, the size of this organ will be more than the norm for a given period), the anatomical features of the body of the expectant mother, etc. Therefore, the examination performed before 12 weeks of pregnancy is of greatest importance for determining the PDD upon arrival at the antenatal clinic, - then the doctor will be able to determine the duration of pregnancy by the size of the uterus ...

According to ultrasound data... Determination of the gestational age and expected due dateit can be done quite accurately if an ultrasound scan is performed in the first trimester of pregnancy (up to 12 weeks). When carrying out an ultrasound examination at the earliest stages (and it is possible to see the ovum by ultrasound from 3-5 weeks of pregnancy, the embryo begins to be clearly visualized a little later - starting from 5-6 weeks of pregnancy), the average inner diameter of the ovum and the coccygeal-parietal size are measured CTE of the unborn child. For each gestational age, there are certain KTP standards, measured in millimeters, by comparing which with the data obtained, you can fairly accurately establish the expected date of birth.

In the second and third trimesters gestational age It is established based on the measurement of certain fetal dimensions: such as biparietal size (the distance between the parietal tubercles, or the large transverse size of the fetal head), head circumference, abdominal circumference, fetal chest and abdomen diameter, femur length. The data obtained also allow us to judge the duration of pregnancy, but it must be remembered that the larger it is, the greater the likelihood of an error. This is due to the fact that as the fetus develops, depending on the characteristics of the course of pregnancy, the presence of diseases of the mother, hereditary factors, the size of the fetus, which is used to judge the duration of pregnancy, will differ significantly. One mother will have a child weighing 2,600 g and a height of 48 cm, and the other - 4,500 g and a height of 57 cm, which is completely normal, since all people have individual anthropometric characteristics. Thus, it is possible to determine as accurately as possible the duration of pregnancy according to ultrasound data in I trimester of pregnancy or around 20 weeks, when there is the greatest agreement between fetal size and gestational age.

By the date of the first stir fetus. PDR can also be determined by such a parameter as the date of the first fetal movement. In this situation, it is more correct to talk about the date when the pregnant woman first felt the fetal movement, since the fetus begins to actively move in the uterus from 8 weeks of pregnancy, just the mother does not feel this due to the too small size of the child. It is believed that primiparous women for the first time feel fetal movements on average from 20 weeks of pregnancy, and multiparous - from 18 weeks, therefore, to determine the expected term of birth according to this parameter, 20 weeks are added to the date of the first fetal movement in primiparous, and in multiparous - 22 weeks.

It should be noted that this method definition of DA considered additional, or auxiliary, since fetal movement is a very subjective sensation, moreover, future mothers do not always celebrate it for the first time in the above terms. For example, primiparous women may first feel fetal movements in later stages of pregnancy - after all, this is still an unfamiliar sensation to them, and at first they may confuse it with intestinal peristalsis or simply not notice. Women with a pronounced layer of subcutaneous fat can first feel the fetal movements 1-2 weeks later. Multiparous women, on the other hand, may notice the first movements at an earlier date (at 16-17 weeks), since they already know how this happens. These circumstances may reduce the accuracy of determining the expected due date by the date of the first fetal movement.

What for calculate DA by several parameters?

The need to calculate estimated delivery dateby several methods at the same time due to the following factors. Firstly, despite the availability of the most modern methods for assessing the gestational age, it is almost impossible to predict when a woman will begin giving birth (accurate to the day). Secondly, some of the data on which it is customary to calculate the estimated date of birth, for various reasons, may be uninformative. For example, with an irregular menstrual cycle, the calculation of the PDD by the date of the last menstruation will not be accurate, and with a late first appearance at the antenatal clinic, the presence of gynecological diseases (uterine fibroids) or overweight, it will be difficult to determine the gestational age by the size of the uterus. Given these circumstances, the doctor sets the expected due date for the maximum amount of data to clarify the time interval in which the birth will most likely begin. As a result estimated delivery time most often it is defined not as one specific number (for example, January 15), but as a time period (for example, from 12 to 17 January).

Nevertheless, even when the estimated date of birth is correctly calculated according to all data, not all pregnant women begin to give birth, since the duration of pregnancy in each case depends on many factors. That is why the date of birth is called the alleged.

Pregnancy durationand, consequently, the period when regular labor will develop is individual, moreover, it is calculated based on the fact that childbirth will begin after full 40 weeks, but pregnancy is considered full-term after 37 weeks, so childbirth can begin in 2-3 weeks before the expected date of delivery. A variant of the norm is the development of labor in the 41st week of pregnancy.

Thus, on pregnancy duration and the onset of labor is influenced by many factors, among which the characteristics of the history play an important role - the age of the expectant mother, the number of previous births, the presence of miscarriages, premature births and / or abortions in the past, existing chronic diseases. In addition to these features, for a period onset of laborthe peculiarities of the course of this pregnancy also affect. For example, with multiple pregnancies, childbirth often begins earlier than with a singleton, and the gestation period is inversely proportional to the number of fetuses (the more fetuses, the shorter the period), which is due to overstretching of the uterus. With the development of placental insufficiency (pathology of the course of pregnancy, in which one or more functions of the placenta are disrupted, leading to insufficient provision of the fetus with everything necessary for growth and development), both early development of labor and an increase in the duration of pregnancy by 1-2 weeks are possible.

Despite the impossibility of an absolutely accurate determination of the date of birth, it is still necessary to correctly calculate the DA. Focusing on the expected term of delivery, the degree of biological readiness of the expectant mother's body for childbirth (determined by a doctor for a number of reasons, one of the main is the degree of cervical maturity - the presence of biological readiness for childbirth is the key to the physiological course of childbirth and a favorable outcome for the mother and fetus) and condition fetus, the doctor will be able to promptly resolve the issue of the need for preparation for childbirth, prenatal hospitalization, drug treatment, etc.

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Calculating the date of birth by date of conception

On average, gestation ("interesting position") in women lasts two hundred and eighty days from the moment of ovulation.

280 days is ten obstetric months. Or forty obstetric weeks. Plus, the first two first obstetric weeks before ovulation from the first day of the last menstruation. In this case, ovulation occurs on the fourteenth day of a woman's menstrual cycle. That is, knowing the date of the first day of the last menstrual period, add fourteen days to it, and then add another two hundred and eighty days, and you will receive the estimated date of birth (DA). Sperm can live up to three days. Therefore, for the starting point, when we try to determine the date of birth by the date of conception, we do not take the day of conception, or sexual intercourse at which the conception was most likely to occur. The starting point is the day of ovulation.

Determine the date of birth according to the last menstruation

Formula Negele - subtract 3 months from the first day of the last menstruation and add 7 days.

Much depends on what kind of menstrual period the future mother has. If it's less than twenty-five days old, the baby may be born a week or two earlier than the intended date. If the future mother's menstrual cycle is more than thirty days, childbirth may be delayed for a week or two. Such a delay will not be considered an overtime. Two hundred and eighty days is just the average pregnancy duration. However, each female body is individual.

Calculate by ultrasound

There is another way to find out the due date. This can be done using ultrasound (ultrasound) of the fetus. This method is the most accurate and reliable in terms of calculating the date of birth according to the previous two methods. If ultrasound is performed at the very end of the first trimester, the date of delivery can be determined with an error of no more than three days. During the second and third trimester of pregnancy, this method will not give such an accurate result.

After the first movement of the baby

1. From the day of ovulation;
2. From the first day of the last menstruation;
3. Using ultrasound examination of the fetus.

Now we will talk about one more method. Let us determine the PDR by the first movement of the intrauterine child. Each expectant mother with such trepidation and impatience is waiting for the birth of her baby. Therefore, it is very important for a pregnant woman to try to accurately calculate the expected date of birth. How to do this, do I know the date of the first movement of the baby?

This means that after the first stirring during the first pregnancy, about twenty weeks, or five obstetric months, remain before birth. By marking these twenty weeks on the calendar, you will receive an estimated due date. To determine the date of the long-awaited meeting with the baby in the second or subsequent pregnancy, twenty-two weeks should be added to the date of the first stirring, because in this case the gynecologists note the first stirring usually at the eighteenth week.

However, you should understand that calculating with this method gives an approximate due date. The error can be more than two weeks.

After obstetric examination

Until the twelfth obstetric week of pregnancy, each expectant mother needs to register at the antenatal clinic with her local gynecologist. Starting from the twentieth obstetric week of "interesting position" when visiting his gynecologist, the doctor measures the size of the abdomen, and also measures the height of the fundus. These data are regularly entered into the exchange card. The doctor, based on these indicators in dynamics, can calculate the estimated date of birth of your Miracle. It should be noted that this will be an approximate time. You can more accurately calculate the maternal birth rate using our birth date calculator. This is a truly effective method with a minimum of deviations and errors in the calculations.

After examination by a gynecologist

A gynecologist during regular examinations of a pregnant woman evaluates the dynamics of uterine growth. This organ grows in size with the fetus. According to systematic examinations of the size of the uterus, an experienced and qualified gynecologist can predict the expected date of birth. In this method, it is very important to monitor the health of a pregnant woman in the first trimester of bearing a child. Such a prognosis will be effective when monitoring a pregnant woman in the early stages. According to the results of the examination in the second and third trimesters, the prediction of PDD will have a large error.

How accurate are the timing results

Realities are such that the duration of bearing a child is individual for each woman.

1. Is your first pregnancy;
2. What is the length of the menstrual cycle of this woman;
3. Single or multiple pregnancy;
4. Genetic features and much, much more.

If a woman gives birth not at the fortieth week, but at the thirty-eighth, this will also be considered the norm.

And even if mommy gives birth in the forty-second or forty-third week of pregnancy, this will also be the norm. Although many of the above methods for predicting the estimated date of birth in their formula have the fact that the average pregnancy lasts two hundred and eighty days, that is, forty weeks.

The peculiarities of the course of pregnancy and the health characteristics of this particular expectant mother can lead to premature birth.

However, pregnant women who have calculated the expected due date are better able to organize the time of their "interesting position." Documents and a bag for the hospital are ready on time. All examinations were completed on time. Ready and renovated children's room. Courses for young mothers have been completed. Completely ready to breastfeed.

Therefore, this is a very useful thing for both mom and baby!

Are deviations from the deadline normal

Are deviations from the estimated due date normal? Of course they are. Only seventeen percent of women give birth in the predicted PDD, while the remaining eighty-three percent give birth either earlier or later than the PDD.

Maximum accuracy in calculating the date of delivery is not to be expected. This is only a conditional guideline. The lighthouse on which the frigate is heading for a happy pregnancy and a happy motherhood. Not a single specialist, no matter how outstanding his qualifications, is able to take into account dozens of factors of a particular organism of a woman and an intrauterine baby.

Thus, during the normal course of pregnancy, labor occurs between the thirty-eighth and forty-second weeks. In this case, the birth of the baby will be normal (neither premature nor late).

Remember that carrying a baby, it is very important for a woman to maintain a positive psycho-emotional mood, drive away unfounded fears and experiences. Our birth date calculator will help you maintain a positive attitude - very soon you will be a mother! Health to you and your baby!

It is very easy to find out the date of birth by the date of conception if there are no hormonal disruptions 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, because it is extremely important. We suggest that you familiarize yourself with methods that will help establish the truth.

Date of conception: what is it?

This is the day when the fusion of the male (sperm) and female (egg) germ 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 precisely in these two days or 2-3 days before, but after that it is already impossible. The fact is that sperm cells can exist in a woman's body for up to three days, and the likelihood that one of them will wait in the wings is extremely high.

Why do I need to know the date?

This is extremely important to know, since you can find out the gestational age. By the date of conception, doctors can establish a more accurate date of birth, and future mothers, using the plate that we will present in the future, will determine the gender of the baby in advance. You need to know the date in order 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.

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

Since the calculation of the day of conception directly depends on the day of ovulation, the counting rules will come in handy for those women who plan to have a baby. Using the calculator, you can probably 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 over paternity arise. Of course, you can pass DNA tests, but this is an expensive procedure, and both the baby and the father are needed for it, and the second cannot always be present.

How to understand if pregnancy has occurred?

If there are no periods (you have a delay), this may be a sign of a conception that has occurred. Before the onset of delay, you can take a blood test, which will show the amount of chorionic gonadotropin - a hormone that increases dramatically in the presence of pregnancy.

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

If the tests consistently show a negative result, consult a gynecologist in a antenatal clinic, you may have a hormonal failure.

We calculate the day of fertilization on the menstrual cycle

You can find out the date of conception by menstruation, but it will not be the most accurate, since the calculation of the period is carried out from (the beginning) of the last menstruation. Not the fact that it was then that you could become pregnant. 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, so you can find out the expected date of birth. It will also not be accurate, since the cycles are different for everyone, and the date of conception is still in question.

Planning a pregnancy

The calendar of the menstrual cycle should be maintained by every girl, regardless of the presence of sexual intercourse in life. The calendar will help track delays, which may indicate not only the presence of pregnancy, but also hormonal disruptions.

A calendar can help you 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 coming and ranges from 28 to 30 days. Accordingly, we choose the middle for conception - three days, of which two will definitely be the dates of ovulation. The rest of the days before and after it are considered "useless", but still there were many cases when pregnancy occurred precisely in those periods, so using the calendar for "safety" is not recommended.

The calendar will help plan the floor of the baby. As a rule, girls are born after intimacy, which occurred a couple of days before ovulation. Male cells during this period are already less active and remain the most hardy and strong, which guarantees the female sex. If intercourse occurred on the days of ovulation, then there will be a boy, because not the most hardy, but the most active will fertilize the egg.

Electronic test

How to find out the exact date of conception if you have an irregular cycle and are at a loss to guess? 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 easy to use, just like a regular test that only indicates strips. An electronic test will indicate an approximate, but still fairly truthful period, just subtract the number of days, and a more accurate date of conception will be determined. Look at the cycle in your calendar, "try on" the date calculated using the test, and correct the calculation by shifting the number by the day of ovulation.

Ultrasound procedure

Finding out the date of conception by ultrasound is quite difficult, since this procedure is only necessary to confirm the obstetric "verdict". You will still set the day of conception on the day when the last period began.

It’s easy to find out the date of conception. Setting the due date is much more difficult, it is calculated based on many factors. This is an obstetric assumption of the day of conception, forty weeks are counted from it. The baby can be born at the 37th, and at the 42nd, and at the 28th week. Ultrasound also does not indicate the reliable timing of childbirth, only the period in which the baby is supposed to be born. Also taken into account are the mass of the fetus, the first stir and many other factors.

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 just for the sake of curiosity, but for someone it helps in determining paternity.

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

So, we got acquainted with the methods of how to find out the date of conception. Is it possible to determine the sex of the unborn baby by it? How to plan the birth of a son or daughter, focusing on the days of ovulation?

How do I know the gender?

On the Internet, on the advice of friends and relatives, many couples want to know the gender of the child. By the date of conception, by blood group, by the positions used - there are no other methods! Trusting them or not is a purely personal matter, but you can still try. It is easier to find out the sex of the child by the date of conception, for this, tables have been created by the sages of the East. Some of them, such as the Chinese one, are already more than seven centuries old, and they are kept in museums. You do not need to travel 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: a table from China

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

How to find out the date of conception, we already wrote, it is not the specific day that matters, but the month in which ovulation and fertilization took place. Accordingly, in order to find out in advance who will be born, to 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 a baby is born in summer or winter, and therefore choose the date of conception themselves. Many people do not care whether it is a son or a daughter, but still there are 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 with pigtails, buy her elegant dresses. You cannot trust the table one hundred percent, and now we will tell you why.

It’s easy to find out gender by the date of conception with the table if your ovulation occurs in the middle of the month or at the end. If it occurs in the early days of the month, then there may be a huge difference. As we already wrote, male sex cells are able to live in the female uterus for up to several days. If intercourse took place 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 baby's sex from the results of an ultrasound scan, but this study can sometimes give incorrect information.

Grandma's method to recognize gender

Older people know how to determine the sex of a future baby, just by looking at the mother. They say that girls take away beauty, and boys add! If you have acne, the contours of your face are blurry, then most likely you will give birth to a daughter. If the skin has become healthier in appearance, acne has disappeared, the facial contours have become clearer, then wait for your son!

You can look at the tummy. Boys live in stretched forward, even tummies. If you look at the expectant mother from the back, then the pregnancy will be imperceptible, as the whole stomach leaned forward. Girls distribute the tummy on the sides, it does not protrude much forward, but it spreads well on the sides!

You can still follow your desires. Boys are less whimsical, and you will not want to taste a 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 usually did not eat, you can assume that you are expecting the birth of a daughter.

We hope 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 sex!