PDR by date of the monthly calculator. Online pregnancy calculator by week by date of last menstruation. Determine the date of birth according to the last menstruation

Woman waiting for a child as a mass of questions about whether her pregnancy is correctly proceeding, whether the development of crumbages is complied with the standards adopted in medicine, are certain sensations naturally. You can find answers to many questions with the help of a calculator, but not usual, and the calculator for pregnant women. About how such counters work are that they show and how accurate will be discussed in this article.

What it is?

Pregnancy calculator - an app or service that allows you to very quickly find out the many questions of interest to the future of questions at once:

• when approximately the conception took place;
• what the estimated date of delivery will be calculated;
• on what time a woman is now being (up to a day) and how much is left before childbirth;
• what changes in the body of the future mother are characteristic of this period;
• how the baby develops, what sizes it has, what skills have already mastered.

But the calculator, free of charge in online mode, significantly saves time and reduces the likelihood of a banal arithmetic error, from which, as is known, no one is insured. The calculation will not take much time, the program is very easy to use, its interface is simple and understandable for everyone.

From a woman will only need to enter the start date of the last menstruation (the calculator produces calculations by the date of last periods, as well as doctors in women's consultation). Date format includes the number, month and year. note that It is exactly the first day of the last menstruation, not the day of its end, as some think.

In a matter of seconds, the calculator shows on what time a woman is on the day of counting - trimester, month of pregnancy, week and day. The estimated date is displayed when the child was conceived, as well as the DA - the estimated date of delivery.

The convenience of interactive calculators is that everything is not limited to banal calculations, and the woman, finding out its exact period, do not need to be looking for reliable medical information about him for a long time, rereading a lot of superfluous.

The calculator immediately refers to the desired material with a detailed listing of the characteristics of the week, medical recommendations for the future mother, with descriptions of possible problems and ways to overcome them.

With such calculators do not need to guess how there, in the stomach, is the baby. The program shows how much it weighs on this period, what is its growth, which organs and how they develop, which is already able to do crocha, and this information will, of course, are interesting, exciting and useful not only for the future mother, but also for the future dad.

Undoubted plus of such calculators - A reminder of what tests, surveys, screenings should be held on any time. Even if the woman is formed about the direction of analysis, this doctor, either forget at all will forget to visit the doctor and get such a direction, the calculator will remind this.

An indispensable assistant program will be in matters of preparation for childbirth. She will tell you when, on what time it is necessary to start visiting courses for pregnant women, what gymnastics and when you can use when you should start mastering breathing exercises.

The program shows recommendations for proper nutrition, gives answers to questions about the possibility of intimate life at different terms. Some services provide an opportunity to get an online advice of a doctor, a specialist in the field of social security, a psychologist.

Calculators are two types: online services and applications that can be downloaded for free and install on the tablet or smartphone. The second are often supplemented by counter battles with a description so that the woman can be faster to navigate when it's time to go to the hospital. Applications send alerts, reminders.

Some have an emergency function with relatives if childbirth began. There are applications that help with the choice of the name of the future kid in the sacnesses on the day of the day, and also give the characteristics of the family member of his horoscope and the sign of the zodiac.

With the help of applications and online services, a woman can before the campaign to the female consultation, refer to the fetometry of the fetter with norms, clarify what one or another CTG score means.

How it works?

Calculations of calculators and applications are based on an obstetric method of counting the period of pregnancy. Some women think that it follows from ovulation, some are counting from sexual intercourse, which, in their opinion, has become decisive, but these calculations cannot be considered accurate and reliable. And that's why.

The duration of the cycle in different women may differ, it is quite natural, and at one lady it lasts 28 days, and in the other - 35. The third cycle is generally irregular, and its duration fluctuates.

But one remains unchanged for all: the conception is possible only during the period of ovulation. So far there is no mature egg, the woman cannot conceive a child.

In the first half of the cycle, the follicle ripes on the surface of the ovary, inside it, as in the bag, the floor female cell ripens. In the middle of the cycle there is a break-follicle bag under the action of certain hormones, and the oocyte becomes available for spermatozoa. After ovulation, the female goveta lives 24-36 hours a maximum, and if the conception does not happen, she dies. In the next cycle everything is repeated.

Thus, the process of conception for one cycle itself, regardless of its duration, is given 2-3 days. But sexual intercourse can lead to the occurrence of pregnancy not only on the day of ovulation and during the hours that the oocyte lives.

Sperm and sperm can survive longer, and even if sex was 3-4 days before the exit of the egg, there is a high probability that spermatozoa will live to an important event, and one of them fertilizes the female Games immediately after it is released from the follicle.

If the woman leads an active sex life, it is generally impossible to establish which of the sex acts led to conception - to ovulation, during her or after. Therefore, in obstetrics, it is considered to simply believe that the conception occurred during the period of ovulation, that is, about 14 days before the end of the menstrual cycle. And it would be very convenient to consider this way, but here there is an important nuance - ovulation in a woman is not at all obliged to occur on a schedule, it can happen both earlier and later the expected date.

Therefore, it is customary to count on the only unchanging value in this complex equation - from the date of the last menstruation. She usually remembers her usually.

Thus, in the obstetric method, the first day of the last month is - this is the first day of pregnancy, no matter how strange it sounds. And the day of conception usually falls at the end of the second week of pregnancy.

On the delay, the woman learns in 4 weeks of pregnancy, and therefore there is nothing surprising or erroneous in the fact that when contacting the gynecologist about the delay in length a week, a woman has been putting 5 weeks of pregnancy. From the first day of the latter menstruation really passes by this moment five weeks.

This is how your term will calculate any calculator or application. Weeks will be quite familiar, calendar, but the obstetricians will differ from the calendar. They are more like the lunar, because in each of them exactly 4 weeks.

Total pregnancy, in understanding an obstetrician, lasts 40 weeks (on average) or 10 months. If you look at the usual wall calendar, it is easy to understand that this is the same 9 months that are synonymous with the concept of "pregnancy".

The concept of trimester should also not embarrass future mom. It is invented to simplify the understanding of the stage on which the woman is located. In each trimester 3 months (calendar). If you look at weeks, then the calculator will show that the first trimester includes 1-13 weeks, the second - 14-27 weeks, the third - 28-42 weeks.

The estimated date of delivery of calculators and applications also consider the obstetric standard. Their three, and all three give the same results (if you wish, you can check). To calculate the date of birth, you need to do something one of:

• Add 9 calendar months to the first day of the last menstruation, and from the received date to subtract 7 days.
• Subtract from the first day of the last menstruation for three months and add 7 days to the date received.
• Just add 280 days (middle duration of pregnancy) by the first day of the last menstruation.

So consider the timing in consultation, on the same principle there are paper round mobile obstetric calendars.

Alternative methods

More accurate ways to calculate the term of pregnancy does not exist. But there are other methods that allow you to confirm or refute the calculations. The region of their use is quite wide, but without obstetric counters, they lose the lion's share of their informativeness.

Ultrasound

Ultrasound examination allows you to state the fact of pregnancy, evaluate the development of the baby, the placenta, to detect some anomalies and pathology. But in determining the term of pregnancy, this method is based on the obstetric count. The software of modern scanners is laid just such an algorithm. And all women know that the visit of a pregnant woman in the Cabinet of Uz-diagnostics always begins with the question of the doctor about when there were last monthly.

The date is entrusted to the program, and further scanning shows how important an obstetric term for embryonic development (gestational period).

There are situations when there are high hopes on the ultrasound. Usually, it is necessary to determine the term using such diagnostics if a woman does not remember the date of the last menstruation, for example, if there was a long period of the menstrual cycle failure, long amenorrhea.

In this case, the doctor appreciates the kid parameters, relates them with standards and determines the gestational period (approximately), to it add two weeks to obtain an obstetric period.

Informative and most accurate ultrasound is only in early pregnancy. The fact is that embryos are developing at about the same speed. And their dimensions are easier to compare with the existing average norms.

After 9-10 weeks, when the process of embryogenesis is fully completed, all organs and systems are formed, all the fruits begin to develop on their own genetic program, which they are obliged to parents. Some inherited a miniature physique, others - big height, and the difference between the average norms and actual dimensions will be more tangible. Install the term of pregnancy is accurately becoming more difficult.

In chapels

This refers to the first movement of the fetus. Usually it is celebrated in 20 weeks of primary and in 18 weeks repeatedly. Shelling is conditionally considered a middle of the pregnancy. According to the first movement of the fetus, the period of the estimated date of birth of the obstetrics in the recent past was not yet ultrasound. And quite a long time simply was not another alternative.

Correctly determine the term for the movement is quite difficult. The fact is that not all of the primordars are able to accurately recognize the moment of first movement itself, and many just take it for the intestinal peristals. Today, this method is practically not used.

Is it possible to believe the calculator?

The most important question concerns the accuracy of calculators for pregnant women. Is there a chance of mistake? Such a chance is minimal, and it can take place not only when using the calculator, but also when calculating an obstetrician, because the method is used alone. A small error with an error in 1-1.5 weeks may occur with an irregular cycle if ovulation was late or early.

It is necessary to understand that the early ovulation is not too favorable for conception, because most often the ocyte is unplanned, incapable of merging with spermatozoa. Therefore, most often in obstetric practice there is a late ovulation, which only slightly reduces the chances of conception. In this case, the obstetrician and the calculator will put a woman period that will be slightly more real, which will become noticeable from the second trimester of pregnancy, when the baby according to fetometry will be somewhat behind the norm.

In most cases, calculators are considered to be the exact way of determining the obstetric period. Separately, you need to say about the accuracy of the installation of the PDR. The estimated date of birth is because it is intended that it is not the only option. PDR is the end of 40 weeks, and on this day, childbirth, according to medical statistics, occur only in 5% of cases.

It is considered completely normal that childbirth begins on any day, starting from 38 weeks of pregnancy to 42 weeks. Each third baby appears to the Light to the DA, and every fifth - later the set date. There is no way to calculate this day with accuracy. The most accurate calculator in this case is nature that provided that childbirth should begin when both mom and the child will be ready for this.

Menstruation is delayed, and in the tests everything is obsessed with two cherished strips? To go back to the gynecologist, and find out when the kid will appear, which seems to be settled in your tummy, really want? In this case, take advantage of our service to calculate the date of delivery.

Calculate the date of birth online

The methodology for calculating the expected date of the occurrence of genera There are several. All of them are based on the fact that normal pregnancy continues on average about forty weeks, counting from the beginning of the last menstrual bleeding. The estimated date of childbirth will fall on the day after 280 days or 40 weeks after the last periods began.

Calculate the date of birth on our service is very easy, convenient and fast - it will take just a few minutes or even seconds. To do this, you need to fill the calculator windows by numbers corresponding to the date of the first day of your last menstruation in the following format: day, month, year.

In just a moment, the calculator will calculate - and give the result to the monitor.

This service works on the principle of calculating the duration of pregnancy, which in most cases continues throughout 40 obstetric weeks or 280 calendar days. The date of birth can be calculated on their own, if at the day when you started the last menstruation, add the required number of days / weeks. But with the help of this convenient calculator, calculations are made easier, faster and without errors. However, you should understand that this is only an approximate, estimated date, when you can allegedly give birth. The duration of pregnancy is influenced by a large set of factors, so it can last in different women during the unequal period of time.

Calculate the date of delivery by the date of conception

If you are reliably known day, when fertilization has come, then the calculation of the date of delivery by the date of conception will be even more reliable. To find out when the kid will appear on the light, it is necessary for the day that the cherished sexual act took place, add 280 days.

It should be understood that the date of the accomplishment of sexual intercourse (even if you practically a hundred percent are confident in its authenticity and even if this month you had only a single case of sexual intimacy) is not always the date of the child's conception. The thing is that ovulation (exit ready for the fertilization of the egg) can occur every other day or even more after sex, but the spermatozoa that fell into the vagina earlier can wait for this moment to merge with the egg and the formation of a new life. Thus, the calculations may be erroneous in a few days. But all the same date of conception can be defined approximately.

Calculate the estimated date of birth can also be on the day of ovulation. If you keep the corresponding schedule, the calculations will be quite accurate. But it is possible to calculate that the very day can be estimated, even not knowing the exact date of ovulation. It is believed that the egg cell ripens approximately in the middle of the cycle. With a 28-day menstrual cycle, this moment comes 12-15 days. By adding the day of the alleged ovulation of 280 days, it is possible to calculate the date of delivery.

Well, having received the result, proceed to pleasant troubles and do not forget to visit the female consultation on time, where you will have the following nine months.

Know the exact period of childbirth is important for every pregnant woman, because it is better to go to the maternity hospital in advance, and not on the urgent. Today we will understand why all the children are born in different times and how to determine their pregnancy.

Dates of childbirth depend on various reasons: is there a norm?

Gynecologists argue that there is no condition for normal delivery - there is a conditional framework. Normal labor can be 37 and at 44 weeks. For twins, it is generally characteristic of being born on the 36-37 week, and women with a long monthly cycle have every chance to give birth after 42 weeks.

It should be understood that if the child was born normally developed on any time - this is the norm. In case of development and health due to childbirth, children are divided into premature and weary.

• Babies with a small weight, growth, weak development of organs and bodies are called premature. Their moms have been sheltered less than 37 weeks - up to 260 days of pregnancy, so kids could not achieve the necessary parameters. According to statistics, 20% of children are born.
• Transferred children appear on the light after 42-44 weeks - in the period of 294-308 days of pregnancy. It is not necessary to think that when you reinfect you will have a giant. On the contrary - signs of transferred kid: thin, dry, wrinkled skin, weak muscles. The cause of such a state is the formation and dying of the placenta through which nutrients came. Thrust about 10% of moms.

Of all the above, it follows that it is better to give birth on time 37-42 weeks. Knowing when it is exactly that this moment should come, it is easy to navigate with premature fights or when it is uninstalled.

Do doctors help if the lifetime is shifted?

Of course yes! Noticing signs of impending premature births, you can turn to the gynecologist and it will take action. In the threat of premature births, bedding and different drugs, shooting contractions and a relaxing uterus, are prescribed.

When setting, on 40 obstetric weeks of pregnancy, the future mother is placed in the maternity hospital for observation. Inspections and stimulation by the drug causing, accelerate the process. If necessary, the doctor can open the fruit bubble, after that or the childbirth or make Cesarean. After the deposition of water, the baby will appear no later than in 12 hours.

If the lifetime period still moved - do not despair, now they are already kept and significantly premature babies and "slightly" transferred. The most dangerous state is a significant density of the fetus - the baby can be born dead or with serious pathologies - each second transferred child has signs of suffocation, hemolytic jaundice, the defeat of the brain sections caused by oxygen starvation, etc.

How to calculate the lifetime period in gynecology

The obstetric period of pregnancy originates from the first day of your last menstruation. It sounds a little strange, since at that time the child is not yet, but the doctors are so more convenient. In addition, to count the time of pregnancy starts and from the day of conception, which the day of ovulation is considered standard. Ovulation occurs in the norm after two weeks from the first day of the last menstruation.

It is here that the problems with calculations begin. For a month, there may be two, maybe it moves and in the opposite direction. And ovulation can specifically occur due to the classical stress, reception of some drugs, inflammation in reproductive organs, etc. In some women, conception moves and can happen, right in the "safe" day - in front of the most month. Others, menstruation, on the contrary, can go after the coming pregnancy. In this case, it will be more difficult to determine the timing.

The primary gynecologist sets the term based on the patient and gynecological examination data. Touching the uterus, the doctor determines its size, which corresponds to the period of development of pregnancy. The alleged period of pregnancy is recorded in the card, for example, 6-7 weeks, this indicator serves as a starting point for calculating the date of delivery.

Formula for calculating the term of childbirth

Calculate the pre-date of delivery (the lifetime period is abbreviated by the DA) with a simple formula. Her also use obstetrics.

To calculate pregnancy, the date of the first day of the last month is taken. Births should take place through 40 obstetric weeks, which is. 280 days.

Formula for calculating day birth: From the first day of the last menstruation, take 3 months, add 7 days to the result.

Example: Recent monthly started on September 5, count back 3 months, we get June 5th. Adding 7 days, we get PDD on June 12th.

Online calculator Calculation of childbirth: find out when you can give birth right now

• The estimated date of conception.
• Terms of important stages of development of pregnancy.
• Current term of pregnancy.
• Time (date) of childbirth.
• Newborn zodiac sign.

It is worth understanding that this method cannot guarantee an accurate result, because the online calculator is just a set of formulas designed for a standard situation. Therefore, you can only find out about the delivery time in this way.

How to determine the term of childbirth exactly - the ultrasound of the fetus and no self-identity!

The most reliable method for determining the timing of childbirth is an ultrasound study of the fetus, called screening during pregnancy. Uzisser, based on the instrument testimony, compares the size of the fetus with the standard and makes the verdict - the term of pregnancy and the DATD date (preliminary date of delivery). Rather, you can very accurately determine the term of pregnancy, and the date of delivery will be alleged, since, as we have noted above, it depends on many factors.

No wonder among pregnant women exist, the proverb "PDR came up with enemies", since the coincidence of the birth with the specialist delivered by the expert does not always happen.

Causes of premature and belated births:

• Pregnant woman's body parameters. Health, structure and state of the uterus.
• Hormonal equilibrium (Generic activity begins under the influence of the hormone, stimulating the cutting of the uterus).
• Practions Parameters. Development depends on the quality of blood supply, genetic features, location, etc.
• Having dangerous infections. A number of infectious diseases may cause premature genera.
• Injuries, stress, etc. Factors.

Symptoms of disorders of childbirth

It is not so easy to understand that the following symptoms correspond to something out of date:

• Premature childbirth begins with whining the abdomen, the appearance of discharge, increased activity of the fetus. The stomach may not hurt - light "sipping" in the back will be felt. Can move water - leaving a large amount of liquid. All these signs are 3 reason to call ambulance.
• With true, the abdomen and weight decreases. In the chest may appear instead of colostrum milk. And on ultrasound, doctors will determine whether the child suffers from lack of food or you just have a prolonged pregnancy.

If you have had premature childbirth, you do not need to panic. If the child breathes himself and its mass is more than 2.5 kg, then everything is in order. A little love, care and mother milk, and he will grow up a great man. In the history of such examples mass. For example, Napoleon Bonaparte appeared two months ahead of time.

But if you have gathered all packages for childbirth for another 37 week, and already 42, then urgently go to the hospital. It is worth hoping for a doctor's mistake - if the term was installed on the ultrasound of the fetus, then he needs to trust.

Where to determine the date of birth in St. Petersburg?

Specialized has been working in St. Petersburg. There is a new ultrasound apparatus with doppler, allowing both 4d formats. Reception leads leading specialists obstetrician-gynecologists with the highest qualification category. Prices for screening of the fetus are minimal, from 2x thousand rubles. - only 1000 rubles. Here you can pass tests on hCG and Torch complex.

Pregnancy is one of the most exciting and at the same time responsible periods in the life of each woman, and therefore it is not surprising at all that each of us wants to seek to find out the date of birth. However, this question often causes numerous disagreements and disputes. Future mothers "torture" with their questions of doctors, because you want to prepare for an important event, but they are just bred by their hands, because it is not able to determine the deadline for the long-awaited kid with high accuracy.
In order to calculate the date of delivery, click the button "Find out the date of birth."

Today: 24.02.2020
Date of the first day of the last month:
The conception of the most likely happened (+2 days):

Estimated delivery time:
Before childbirth, it remains:

The calculation of the estimated date of delivery (PDR) is made in several ways, each of which is approximate. That is, if the kid should be born on January 1, then it is not a fact that it will happen with one hundred percent accuracy that day. Very often, deviations from the intended date in one direction or another. And childbirth can begin either 2 weeks earlier or later. I suggest your attention is quite simple, but a very effective way to find out the likely child's birthday, which has been successfully used for quite a while and successfully used by many doctors in clinics.

Calculation on the last day of menstruation

So to independently calculate the term of pregnancy And on it to determine the alleged day of childbirth, it is necessary to recall the date of the early menstruation. It is based on it is all computing. From this date it is necessary to subtract 3 months and add to the result for another 7 days. The resulting number and will be an estimated term of birth of your long-awaited baby.
For example, the date of the last menstruation is April 22. So, this date you need to subtract 3 months. We take away and get - January 22. To this figure add another 7 days and we receive January 29 - this day and will be an intended date of birth.
It is worth noting that this method of calculation is best suited to women with a regular menstrual cycle, which lasts 28 days.

4 alternative ways to calculate the term of birth

• 1. Find out a duration of childbirth, with rather high accuracy, you can visiting the gynecologist's office. The doctor will not assign any analyzes for this, it will simply measure the size of the uterus, which will be increased in size in accordance with the age of the fetus. However, this method of calculating the date of the appearance of the baby is effective only in the first trimester of pregnancy. In the late lines (in the 2nd and 3rd trimester), each woman has an increase in the size of the uterus occurs with different intensity, depending on the individual characteristics of the body.
• 2. It is possible to calculate the date of delivery by ovulation, which is the most favorable period in which is most likely and conceived. On such days, a woman, usually, is experiencing increased sexual attraction. In addition, its discharge (cervical liquid) become more sticky and thick, the basal body temperature increases by several tenth of degrees, the neck of the uterus is raised, and the mammary glands are compacted and becoming painful.

So, to find out when your baby is born, on ovulation, it is necessary to add 280 days to this day (the duration of pregnancy). The resulting time and will be a date of birth. If the period in which ovulation occurred is unknown, then calculate the middle of the last menstrual cycle, and then add the rest to it.
Similarly, you can perform calculations and by the date of conception. However, it should be known that this period does not always coincide with the afternoon, which took place in a sexual act. Fertilization of the egg, as a rule, occurs only on the third day.

• 3. Hardware calculation with ultrasonic waves can also be attributed to the most effective methods that allow you to determine the delivery time up to 1-3 days. The most faithful calculations will be, if ultrasound do in the period 11-14 weeks of pregnancy.
• 4. To declare the secret of the date of birth of your child will help his first movement, which usually occurs at the 20th week (from primary) and on the 18th - with the second and subsequent pregnancy. In ancient times, when there was no ultrasound, such a method calculated the deadlines was, almost the only one.

As soon as the future mother will feel in the stomach the first tangible push of their baby, then from this moment 20 weeks should be counted. The resulting date and will be likely the day of the child's light. If the birth is not the first, movements are usually felt earlier - at week 18, so it will have to add to this term not 20, and 22 weeks.

The effectiveness of hardware methods in the calculation of the term of childbirth

The study of the fetus in the third trimester on the ultrasound device allows you to determine the date of pregnancy with high accuracy, and therefore the estimated period of childbirth. The fact is that only with the help of ultrasonic diagnostics, the doctor may observe the state of the placenta, the position of the baby's head in relation to the entrance to the small pelvis, the level of opening of the cervix, signs of maturity of the fetus, as well as many other important factors. All these parameters are decisive on the issue of determining the readiness of the future kid and his mother to childbirth.

Deviation from the deadline is the norm?

As mentioned above, all the calculations of the estimated date of birth are no more than an exemplary guide, which is not necessary to rely greatly. According to statistics on the appointed day, only 17% of women give birth, while the remaining 83% either earlier or later. Thus, it can be concluded that not one specialist is capable of predicting the date of commencement of generic activity, no matter how smart and qualified it.
Normally, childbirth may occur in the interval from 38 to 42 weeks. Pregnancy. The appearance of a child will not be premature, nor late, but normal and physiological. Sometimes for certain reasons, the generic activity can begin prematurely. This happens due to deviations in the development of the fetus, stressful situations, various pathological processes occurring in the organism of the mother, hereditary factors, etc.
It is often occurring to the migration of pregnancy due to the fact that in the first trimester there were any complications. In addition, heredity in the maternal line should be taken into account. If your mother and grandmother gave birth much later than the deadline, then, most likely, the same awaits you. Therefore, it is very important to realize that the calculation of the term of birth - the question is very complex, conditional and individual for every future mother.

How affect the date of birth features of the menstrual cycle?

The duration of childbirth also affects the duration of the menstrual cycle of a woman. For example, if it exceeds the standard twenty-eight days, then most likely, the pregnancy will last more than forty weeks, and vice versa. However, in this case, the deviation in one direction or another does not usually make up not more than 5 days. It is worth noting that errors are often allowed in such calculations, since it is very often for menstruation takes ordinary bleeding, which have been discovered after fertilization of the egg.

Methods for determining the date of delivery

Date of birth: Are there an exact methodology for its definition?

The date of birth is the main thing that worries women who are driving under the child's heart. Each pregnant woman wants some kind of certainty. Only by learning about the offensive of the long-awaited pregnancy, the future mother wants to know the date of the alleged childbirth. But how to do it? Many women are trying to calculate the date of delivery by the date of conception. And this is not exactly the right way, adding the estimated date of conception of 9 months to calculate the date of delivery. But this method of determining the date of delivery by the date of conception is not quite faithful. Pregnancy lasts not exactly 9 months, and 280 days (10 lunar months). So how to correctly determine the date of delivery by the date of conception? Are there any other methods for determining the date of birth? Which one is the most accurate?

Determining the date of delivery by the date of conception and the day of ovulation.

The date of delivery by the date of conception is determined quite simple. As you know, the female organism is capable of conception only during the period of ovulation - the release of a mature egg from the ovary. The women's menstrual cycle lasts, an average of 28-35 days. And ovulation occurs in the middle of the menstrual cycle. Knowing the date of its ovulation can be easily predicted by the date of birth. Some women feel their ovulation. During this period, they feel riding or smearing the feeling at the bottom of the abdomen, the number of discharges from the vagina increases, the sexual attraction increases, and some even begin the unlighted oscillations (bloody) allocations from the vagina. Ovulation accurately determined on the ultrasound. But how to determine the date of birth, if you do not know exactly the day of ovulation? To do this, you can simply calculate the middle of your menstrual cycle and add 280 days to this day. Thus, you will calculate the approximate date of delivery by the date of conception. For example, if your menstrual cycle lasts 28 days, then ovulation occurs somewhere on 12-14 day cycle. Add to the date of the alleged conception of 10 lunar months (280 days), and get an approximate date of delivery. If you calculate the date of delivery by the date of intercourse, then this option is even more reliable, especially if the sexual act in the last menstrual cycle was single. But it is worth remembering that the date of conception may not coincide with the day of sexual intercourse. Spermatozoa can "live" in the female body up to several days. That is, if unprotected sexual act occurred on the 10th day of the cycle, then ovulation and conception could occur for 12-13 days. And it is necessary to calculate the date of birth on the basis of the date of conception, that is, starting from the date of ovulation.

Determining the date of delivery, based on the date of the last menstruation.

Coming to a consultation to the gynecologist, usually the first thing that the doctor asks is when there was a last menstruation. Young inexperienced girls, for the most part, are not particularly followed by the regularity of their menstrual cycle and cannot call the exact date. Others begin to remember the start and end date of menstruation. Although the doctor for determining the term of pregnancy and the date of the alleged childbirth needs to know only the day of the first day of your menstruation. It is from this day that the menstrual cycle is conducted and its duration is calculated.

The simplest formula that gynecologists themselves use to determine the date of delivery is the formula of Nemele. In order to calculate the date of birth, it is necessary to take three months from the first day of its menstrual cycle and add seven days. For example, your last monthly started on April 3. We take three months - it turns out on January 3. Now add to January 3, 7 days. It turns out on January 10 - this is the estimated date of childbirth.

But this method of determining the date of birth is far from always distinguished by high accuracy. Since it is designed to determine the approximate date of delivery for women who have a menstrual cycle of exactly 28 days. If he is longer, then the date of birth, most likely comes a little later and vice versa. This is due to the fact that with a long menstrual cycle, ovulation occurs later, and with a shorter earlier, 12-14 days, with the calculation to which this formula was derived. With an irregular menstrual cycle, so in general, the ovulation date is very difficult to determine and use this method to determine dates of birth It is considered wrong.

Determining the date of delivery by ultrasound.

It is considered to be the most accurate to determine the date of delivery with the help of an ultrasound study in the early periods of pregnancy, up to 12 weeks. After passing an ultrasound in very early time, you can find out the term of your pregnancy with an accuracy of just one day, and in accordance with this, calculate the approximate date of conception and date of delivery.

The term of pregnancy put on ultrasound and at later pregnancy, in accordance with the sizes head and fetal limbs. But the conclusion of such an ultrasound should not be taken as the basis for determining the date of delivery, since all the kids develop in their own way, individually. And some children weighing 5 kg are born, while others are 3 kg. Both are the norm. But only in the first case, a woman on the ultrasound in the second and third trimester of pregnancy will be exposed to a pair of a couple of weeks more than the present and, accordingly, the date of delivery will be exhibited earlier. The childhood, most likely, will begin later, and doctors, and the woman herself will rush the events, thinking that pregnancy is transferred, and the estimated date of birth has already passed. Conversely, at low, slender parents are born children with the same constitution. And on ultrasound, a woman is diagnosed with "intrauterine delay in the development of the fetus" or simply put a term of pregnancy less than it is in fact, thereby pushing the right date of delivery to a later date.

Setting the approximate date of birth according to the results of a gynecological inspection.

The gynecologist conducted by a manual inspection of the genital organs of a woman can determine the pregnancy "to the touch". The term of pregnancy can be put absolutely accurately, starting from 3-4 weeks. It is worth knowing that at later deadlines (more than 12 weeks) put an accurate period of pregnancy and determine the approximate date of delivery will be almost impossible. The reason for this is the same as when conducting an ultrasound in late terms is that each child develops in its own way, individually. So, what does the gynecologist draw on when conducting an inspection? First of all, this is the size and shape of the uterus. In pregnant women, the uterus becomes a spherical shape (in non-heaven healthy women of the uterus of the pear-shaped form) and increases in size. A more or less experienced gynecologist puts the term of pregnancy and approximate date of birthBased on the size of the uterus.

Determining the date of delivery at later pregnancy.

There are cases when it is difficult to determine the date of delivery by the date of conception. In such cases, it is possible to use such a proven technique as the definition of the date of delivery by the date of the first chapter of the baby.

The kid in the mother's womb begins to make his first movements pretty early, about 12 weeks. But the pregnant woman does not feel them, as the baby is still very small. The present seams of the primary woman begins to feel on the period of 20 weeks, repeatedly - in 18 weeks. Thus, that calculate the date of birth, in the first case to the day of the first movement you need to add 20 weeks, in the second case - 22 weeks. Thus, we will get an almost accurate date of birth. Many women tell me that they begin to feel the first movements much before the deadline - at 16, or even 14 weeks. Gynecologists are usually not perceived seriously such statements, writing off allegedly chasing the baby on the intestinal cuts. But such sensitive women are still found and, in their case, the determination of the date of delivery by the date of the first movement of the baby will be incorrect.

Somewhere from 14-16 weeks of pregnancy, a gynecologist can accurately determine the term of pregnancy and an approximate date of genera with the help of an ordinary inspection (not on the gynecological chair). To the touch, he will define the height of the bottom of the uterus, on the basis of which it will be possible to judge the term of pregnancy and calculate the date of birth, not by the date of conception. At 16 weeks, the bottom of the uterus is between the pubic and the navel, in 24 weeks - in the navel area, at 28 weeks - 4-6 cm above the navel, etc. There is another methodology determination of the period of pregnancy and the date of delivery - measurement of the circumference of the abdomen. But it does not differ accuracy, since we all are different and the volume of the waist originally we have all different. In women, inclined to completeness, the abdomen will be, in any case, more than a thin woman who put exactly such a date of birth. Measuring the length of the uterus is much more informative for calculating the date of the upcoming birth.

Why is the date of delivery called not exact, but only approximate?

Indeed, calculate the exact date of birth is not possible even by the date of conception. Causes of errors of calculating the date of labor of conception, we considered at the beginning of this article. A relatively small percentage of women gives birth at the time defined by a gynecologist. Although they say that pregnancy should last exactly 40 weeks, but in many cases it is not. The date of birth may occur at 38 weeks and it is also not pathology. With multiple pregnancy, childbirth almost always occurs before the date defined by the gynecologist. At the date of birth, more precisely on its offensive, some other factors, such as multi-way, high pressure in a pregnant woman, diabetes, etc., can also have influence. Calculate the date of delivery by the date of conception can be using an online calculator.