Calculate the date of delivery: proven methods

Calculate the date of delivery: proven methods

 

There are several ways to calculate the date of delivery.. However, oddly enough, only an experienced obstetrician-gynecologist can precisely determine the date of birth, since many factors affect the duration of a child's birth, including heredity. By the way, the international community of obstetrician gynecologists recently recognized full-term pregnancy at 38 weeks and not only at exactly 40 weeks.

In short, even if you cancalculate the date of birth, you should not relax. And within plus or minus two weeks from the appointed time, you need to be ready for childbirth, that is, to collect the necessary things, sign the exchange card at the hospital, talk to the doctor who will take delivery if this is your plan.

Today, medicine knows many ways how to calculate the date of birth. This can be done by the date of conception, by the date of ovulation, by the first day of the last menstruation before pregnancy, by the date of the first movement of the fetus.More precisely, the doctor can give a preliminary date of delivery during an ultrasound examination (ultrasound) or during a gynecological examination, when measuring the size of the uterus. There are also the so-called folk methods of calculating the date of birth, when the obstetrician can determine the date of birth by the future mom - the shape of her tummy and its descent-elevation. But here the experience of a midwife is very important, without which it is unlikely to be able to calculate the date of birth. And this method “works” only on the eve of childbirth.

Read also:Start of labor: 5 main signs

It is important to know!

The future mom needs to know that, according to statistics, only 4% of pregnant women give birth on the day prescribed by the doctor. That is why the date of delivery, which is listed in the exchange card, is called preliminary. So worry, if the birth began a few days or even weeks earlier, it is not necessary. On average, the pregnancy lasts 10 lunar months, or about 280 days. However, everything is individual here. As a rule, the date of childbirth is “determined” by the baby himself when he is fully mature and ready to be born.

But still let's try to calculate the date of birth the most famous and most accurate ways.

Calculate the date of birth on the day of conception

Calculate the provisional date of delivery (DA) is easiest for the day of conception. If you, of course, precisely know this significant day. If the date of conception is known to you, then just add 280 days to it - the period of an average pregnancy and get a possible date of birth of the baby with variations in plus or minus two or three days.

Calculate the date of delivery: proven methods - image №1

Calculate the date of birth on the day of ovulation

Ovulation, that is, the day when the egg leaves the ovary, on average occurs on the 14th day of the menstrual cycle, although options are also possible here. To determine the day of ovulation is quite simple, knowing the duration of its monthly cycle and the first day of the last menstruation. However, if the cycle is longer - 30 days, then ovulation will come on the 15th. It is very difficult to calculate this day if the cycle is inconsistent.

It is also necessary to take into account the fact that fertilization can occur within 2-5 days before or after ovulation, since spermatozoa can live this time in a woman’s body. The easiest way to determine the day of ovulation with the help of special tests that are sold in a pharmacy. So, knowing the day of ovulation, add to the date 280 days - the duration of pregnancy, and get a preliminary date of birth.

To determineOvulation is possible using the online ovulation calendar on UAUA.info.

Calculate the date of delivery for menstruation

As a rule, the date of preliminary labor is most often calculated from the first day of the last menstruation, adding 280 days to the date. Usually this is the date the gynecologist writes to the exchange card. Unless, of course, during the ultrasound revealed new circumstances.

You can also calculate the date of birth of the child as follows: from the date of the last menstruation, take 90 days (that is, 3 months) and add 7 days. For example, if the last cycle was January 31, then childbirth will occur approximately November 7 of the same year.

This formula is good for those who have a constant menstrual cycle and is 28 days. With a longer cycle, childbirth will occur a little later, with a shorter one, a little earlier.

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Read also:Pregnancy and childbirth after cesarean section

Calculate the date of delivery on the baby's jolts

Another way to find out when your beloved baby will be born is by stirring the crumbs. During the first pregnancy, the first tremors of the child are usually 18-20 weeks. Those who become mothers for the second time can feel fetal movements at 16-18 weeks. To this date, it is necessary to add 20 weeks to those who give birth for the first time, and 22 weeks to those who repeatedly.This will be the preliminary date of birth of the child.

Of course, it often happens that a woman cannot give an exact date when she first felt the movement of a child. And this is the main problem with this calculation.

Mom forumchanka under the nickname KATALINA shares her experience:

“In my first pregnancy, my mother calculated the date of delivery for the first movement, and I gave birth straight to the day :) Although the monthly and ultrasound periods were different. I remember, I started to move at 18 weeks, and she, it seemed, added another 20 weeks. I know for sure that if I started moving at 16 weeks, then I need to add 22 weeks, if at 20 weeks, then add 18 weeks, at least, it was written in one of the magazines for parents. ”

Calculate the date of delivery based on ultrasound results

According to gynecologists, the most accurate way to calculate the date of birth is ultrasound. Already on the first ultrasound scan, which is usually done for a period of up to 12-14 weeks, the doctor calculates the DA, given the size of the fetus, which in early terms makes it possible to accurately determine the preliminary date of birth.

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Calculate the date of delivery based on the results of the gynecological examination

During pregnancy during the first examination, the obstetrician-gynecologist, as a rule, immediately determines the duration of the pregnancy, taking into account the degree of uterus enlargement.On the gynecological scheme of the ratio of gestational age and the size of the uterus, the doctor puts the DA.
Then, after the 20th week of pregnancy, during your every visit, the gynecologist will measure the height of the uterus to monitor the pace of pregnancy and identify possible problems, since there must be certain indicators at each time.

Read also:Do you believe the myths about pregnancy?

How to determine the date of delivery by the height of the bottom of the uterus

Says obstetrician-gynecologist A.O. Vergulenko Fall:

“The height of the uterus bottom (VDM), or the height of the uterus bottom, is the distance between the upper edge of the pubic junction and the upper wall of the uterus protruding from the pelvic cavity. The uterus increases according to the growth of the fetus and, starting from the end of the 4th obstetric month (16 weeks), the bottom of the uterus is already available for measurement through the anterior abdominal wall. Prior to this, the growth rate of the uterus, the doctor determines during vaginal examination.

The WYD is measured at each visit to a pregnant antenatal clinic, starting at 16 weeks of gestation. To do this, the woman lies down on a couch with her legs straightened and, preferably, with an empty bladder, and the doctor measures the height of the uterus bottom with a measuring tape.The study takes only one minute, but allows you to judge the nature of the growth of the fetus, its position and the amount of amniotic fluid. There are generally accepted WDM values ​​corresponding to a specific gestational age, however, it must be taken into account that this is still an individual indicator, and its value can vary within 3 cm. Pay attention to the rate of increase in WDM relative to the previous value. Starting from the 24th week of pregnancy, the height of standing of the bottom of the uterus usually coincides with the gestational age. And a few days before the birth, when the head of the fetus is installed in the pelvic cavity, the bottom of the uterus is lowered by 2 - 3 cm.

If the height of the bottom of the uterus is below normal, this may mean: an error in determining the duration of pregnancy; wide capacious pelvis in tall large women; intrauterine growth retardation; low water - reducing the amount of amniotic fluid.

If AMD is higher than normal, then this may indicate: large fruit; multiple pregnancy; narrow pelvis; wrong fetal position; polyhydramnios - an increase in the amount of amniotic fluid. Also to monitor the condition of the fetus, its growth rate and the amount of amniotic fluid still measure the abdominal circumference (OJ) at the level of the navel.

This indicator is very dependent on the individual characteristics of the woman and the thickness of the subcutaneous fat, therefore, they take into account the dynamics of increasing the circumference. Using these two indicators at the end of pregnancy, it is possible to calculate the estimated mass of the fetus. To do this, multiply the value of VDM by coolant. For example, if the VDM is exactly 36 cm and the coolant is 95 cm, then we get the possible weight of the child - 3420 grams. If the height of the bottom of the uterus does not meet the term of more than 3 cm, then the doctor prescribes additional examinations for the pregnant woman. They carry out fetal ultrasound, doplerometry and cardiotocography and, based on the results obtained, prescribe treatment and determine the tactics of the upcoming delivery. ”

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  • Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods

    Calculate the date of delivery: proven methods