DEGREES OF COMPARISON OF ADJECTIVES In English, as in Russian, ...
Many women, when they find out about their pregnancy, begin to experience a variety of feelings - some are overwhelmed with joy, others feel confusion. And, of course, every expectant mother has a lot of questions. They are especially interested in the day of the birth of their child.
Calculation By date of conception
It has been established that conception is possible only during ovulation, when a mature egg leaves the follicle to meet with the sperm. Ovulation usually occurs on the 14th day of the menstrual cycle (the period starting on the first day of the onset of menstruation and ending on the first day of the onset of the next). The duration of the menstrual cycle is different for every woman. It can be 28-35 days. On average, it lasts 28-29 days.
A woman planning a pregnancy or monitoring her cycle can accurately determine the day of ovulation. In addition, during this period, signs characteristic of it appear.
It is worth noting that the day of sexual intercourse may not coincide with the day of conception, since the viability of individual spermatozoa in a woman's body reaches up to 3 days.
So, knowing the day of ovulation, you can quite accurately calculate the date of birth. You just need to add 280 days to this day (the average duration of pregnancy). Please note that only a woman with a constant menstrual cycle can calculate the period of birth of a baby in this way.
We offer an online calculator that will help determine the period of birth of a child:
Calculate due date by month
Usually gynecologists use this method, it is called the obstetric period. When registering, the doctor will definitely ask the woman when she had her last menstruation. And, in order to calculate the day of birth, he will use the formula invented by the German obstetrician F.K. Negele: 3 calendar months are subtracted from the 1st day of the beginning of the last menstruation and 7 days are added. It is important to note that if the menstrual cycle is not 28 days, then this method of calculation is rather oriented.
Online calculator
(calculation will take a few seconds)
Date of birth by ultrasound
The most accurate way to determine the time of birth of a child is diagnostics by ultrasound (ultrasound), but it can only be used on early dates pregnancy (up to 12 weeks). With ultrasound, you can high precision determine the gestational age, and thereby calculate the date of birth. In the second trimester, the gestational age is determined according to the size of the head and limbs of the fetus, but since each child develops individually, the error in the calculations can be up to 7 days. In the third trimester, according to ultrasound, it is generally impossible to calculate the date of birth.
Date According to fetal movements
This method is not accurate. The error can be up to 2 weeks. But still, the expectant mother will have an idea when her child is approximately born. So, the first movement of the fetus during the first pregnancy, a woman can feel at 20 weeks, with the second at 18 weeks. It is known that it lasts 40 weeks. It turns out that in order to find out the approximate date of birth, you need to add 20 weeks or 22 weeks to the date of the first movement.
Unfortunately, it is impossible to calculate the birthday of a child using all these methods. Many factors can influence this. These include various diseases(polyhydramnios, diabetes, preeclampsia, multiple pregnancy, genetic features, irregular menstrual cycle and others). According to statistics, only 10% of babies are born on the date set by the doctor when registering. Therefore, it is impossible to accurately calculate the date of birth, you can only approximately find out when the baby will be born.
Views: 988378 .Enter the first day of your last menstrual period
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June 2018
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Conception date
days before delivery
September 2018
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date of birth
June 2018
Alleged
Conception date
days before delivery
September 2018
Alleged
date of birth
Calculation of the date of birth by the 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 obstetric weeks before ovulation from the first day of the last menstruation. In this case, ovulation occurs on the fourteenth day of the woman's menstrual cycle. That is, knowing the date of the first day of the last menstruation, add fourteen days to it, and then add another two hundred and eighty days, and you will get the estimated date of birth (DA). Spermatozoa can live up to three days. Therefore, as a starting point, when we try to determine the date of birth from the date of conception, we do not take the day of conception, or sexual intercourse, on which most likely conception took place. The starting point is the day of ovulation.
Determine due date from last menstrual period
Negele formula - subtract 3 months from the first day of the last menstruation and add 7 days.
Much depends on what menstrual period the expectant mother has. If it is less than twenty-five days, the baby may be born a week or two ahead of schedule. If the expectant mother's menstrual cycle is more than thirty days, childbirth may be delayed by a week or two. Such a delay will not be considered as overdue. Two hundred and eighty days is only the average duration of pregnancy. However, each female body individual.
Calculate by ultrasound
There is another way to find out the date of birth. This can be done with an ultrasound scan (ultrasound) of the fetus. This method is the most accurate and reliable regarding the calculation of the date of birth using the previous two methods. If an ultrasound examination is performed at the very end of the first trimester, the date of birth 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
- From the day of ovulation;
- From the first day of the last menstruation;
- With the help of ultrasound examination of the fetus.
Now we will talk about another method. We determine the PDR by the first movement of the intrauterine child. Every 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 can I do this, do I know the date of the first stirring of the baby?
This means that after the first movement during the first pregnancy, approximately twenty weeks, or five obstetric months, remained before delivery. By marking these twenty weeks on the calendar, you will receive the estimated date of delivery. To determine the date of the long-awaited meeting with the baby in the second or subsequent pregnancies, twenty-two weeks must be added to the date of the first movement, because in this case gynecologists mark the first movement, usually at the eighteenth week.
However, you must understand that the calculation by this method gives an approximate due date. The error can be more than two weeks.
After obstetric examination
Until the twelfth obstetric week each pregnancy expectant mother you need to register in the antenatal clinic with your local gynecologist. Starting from the twentieth obstetric week of the “interesting position”, when visiting his gynecologist, the doctor measures the size of the abdomen, and also measures the height of the fundus of the uterus. These data are regularly entered into the exchange card. Based on these indicators in dynamics, the doctor can calculate the expected date of birth of your Miracle. Please note that this is an approximate time. You can calculate the due date more accurately using our due date calculator. It's for real 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 growth dynamics of the uterus. This organ increases in size along 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 forecast will be effective when monitoring a pregnant woman in the early stages. According to the results of the examination in the second and third trimester, the prognosis of the PD will have a large error.
How accurate are the timing results?
The reality is that the duration of childbearing is individual for each woman.
- Whether the first pregnancy;
- What is the length of this woman's menstrual cycle;
- Singleton or multiple pregnancy;
- Genetics 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 at the forty-second or forty-third week of pregnancy, this will also be the norm. Although many of the above methods for predicting the expected date of birth in their formula have the fact that the average pregnancy lasts two hundred and eighty days, that is, forty weeks.
To premature birth can lead to the features of the course of pregnancy and the health of this particular expectant mother.
However, pregnant women who have calculated the expected date of birth, better organize the time of their "interesting position". Documents and a bag for the maternity hospital are ready in time. All examinations were completed on time. Ready and renovated children's room. Completed courses for young mothers. Completely ready for breastfeeding.
Therefore, this is a very useful thing for both mom and baby!
Are deviations from the deadline normal?
Are deviations from the calculated due date normal? Of course they are. Only seventeen percent of women give birth on predicted due date, while the remaining eighty-three percent give birth either earlier or later than due date.
The maximum accuracy in the calculation of the date of delivery is not to be expected. This is just a guideline. The lighthouse, on which the frigate of a happy pregnancy and joyful motherhood is heading. 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, in the normal course of pregnancy, childbirth occurs between the thirty-eighth and forty-second weeks. In this case, the birth of the baby will be normal (neither premature nor belated).
Remember that when carrying a baby, it is very important for a woman to maintain a positive psycho-emotional mood, to drive away unreasonable fears and worries. Our due date calculator will help you keep a positive attitude - very soon you will be a mother! Health to you and your baby!
If the delay in menstruation is small and complaints about bad feeling No, it’s not worth it to rush to an appointment with a antenatal clinic. But an inner feeling already tells you that a miracle has happened and soon you will become happy parents of a wonderful baby. Any woman in this position seeks to get an answer to the question: when exactly will the time of birth come? Our service allows you to determine in a matter of minutes the exact date the birth of an unborn child.
Calculate due date online
At the heart of any method of calculating the date of the expected birth is the idea of normal pregnancy, which usually lasts about forty weeks (in some cases, a deviation of several weeks is also not a pathology). The starting point is the beginning of the last menstruation, and it is likely that the expected event will take place exactly in 280 days or 40 obstetric weeks.
With the help of the online calculator presented on the site, you can easily and simply find out the probable date of the upcoming birth. All that is required of you is to enter the necessary data in the appropriate calculator windows, and the necessary calculations are made by the computer. The principle of the calculation is very simple: the date of the beginning of the last menstrual bleeding and the traditional 280 calendar days are summed up.
The date obtained is an approximation, corresponding to ideal medical indications. The actual dates may vary slightly depending on the individual characteristics of the woman, her state of health and the general course of pregnancy.
Pregnancy calendar, how to calculate the date of birth by menstruation
Find the date of your last period on the blue line of the calendar. The date below it (in red or yellow color) and will be the date of birth.
Calculate due date by date of conception
Not every woman knows exactly the day when conception occurred, so doctors cannot reliably determine the so-called "embryonic" gestational age. However, if the time of fertilization is known, then the results of calculating the time of birth will be much more accurate, because each child needs the same period for full intrauterine development. In such cases, you need to add 280 days again, this time to the date of conception.
When calculating the date of birth for the day of fertilization, minor errors are allowed, because pregnancy could not have occurred on the day when the corresponding sexual intercourse occurred. Studies show that the conditions in the vagina are quite favorable for sperm cells, so they can stay here for several days before merging with the egg. The error is from one to three days, but no more. Thus, the date of conception determined by this method is also indicative.
Calculate due date by ovulation
You can determine the date of birth of a baby by calculating the day of ovulation. This method is not suitable for everyone, because only a small number of women carefully monitor their menstrual cycle and, moreover, keep an ovulation calendar. If at least the approximate date of ovulation is known (with a constant cycle of 28 days, it falls in its middle), you can get a more or less accurate date of birth. To do this, add 280 days to the date of ovulation.
Of course, the most accurate results can be obtained if you have the maximum amount of initial data. The best option a combination of all the presented methods for calculating the date of birth is presented. But in any case, a few days of waiting is not a big problem, because the main thing is the birth healthy child and subsequent pleasant chores.
Video: How to determine the date of birth.
The long-awaited pregnancy has come, and you really want to know when you will see your baby? To calculate the gestational age and the expected day of birth, it is enough to know only one date: the day the last menstruation began. It is for her that the gestational age will be calculated by the gynecologist when you come to the clinic to be registered.
Calculate gestational age online
Only a few women can accurately name the date of conception of a child in order to accurately calculate the actual gestational age. And even in this case, the birth of a new life may occur on another day, when future parents do not know about it. At the same time, almost every woman remembers the date of the last menstruation, which is why it is her obstetricians who take it as a starting point. Theoretically, ovulation - the period of release of an egg ready for fertilization - occurs in the middle of the menstrual cycle. Therefore, between the real age of the fetus and the obstetric gestational age (which begins on the first day of the last menstruation), there is a difference of approximately two weeks.
So, in order to calculate the gestational age online, you need to remember when your last period started. Two weeks are added to this day: it is during this period that the egg fully matures - and fertilization can occur. Further, there are two ways to calculate the expected date of birth: the first is when forty weeks are added to the date of the first day of the last menstruation. The second - from the day when conception could occur, three months are taken away and seven days are added to it.
But if you don't like fiddling with calculations, the interactive gestational age calculator will do it for you. Enter your data (the date of the first day of the last menstruation) - and within a second you will receive as a result the gestational age in weeks and days.
Calculate gestational age by date of conception
This calculator can also be used to calculate the gestational age by the day of conception if you are sure that this date is accurate. In this case, you will know the actual (gestational) gestational age, which will correspond to the age of the fetus. The obstetric period that the doctor will give you on the first day of the last menstruation will differ from it by about two weeks (that is, there will be more gestational).
Using our calculator to calculate the gestational age by weeks, you can also find out the approximate due date and start preparing for them in advance: find a comfortable maternity hospital and good doctor, learn breathing techniques in childbirth, choose a comfortable position for childbirth, think about partner childbirth, set up a nursery, and stock up on supplies for caring for a newborn.
This day requires special preparation. There are so many things to buy, cook, study a huge amount of literature, think through all possible scenarios. And it seems to us, women, that it would be a shame not to take into account something.
The whole pregnancy is not only a spiritual mood, but also quite material chores that should be carefully planned.
In a simple formula due date calculation the main component is the gestational age. Conception occurs most often on the days of ovulation, but not every woman knows when these very days come.
Everything is simple - exactly in the middle of the menstrual cycle, i.e. 12-16 days after the first day of the last menstruation.
For example, your last menstruation began on April 1, which means that the egg will go on its difficult path on April 12-16.
This due date calculation is suitable for women with an average menstrual cycle of 24-28 days. With deviations by day in one direction or another, the ovulation period also changes.
Let's assume that conception occurred in the middle of the last menstrual cycle. From this period of time, the long 40 weeks of your pregnancy begin.
Trying to calculate the due date by week
Some women mistakenly add 9 months and get a "supposed" sacred date. This is not true, because pregnancy lasts a little longer - approximately 280 days or 40 weeks.
True, the doctor quickly eliminates this error and helps the patient decide with the help of a special calendar that any gynecologist has.
This calendar has the easiest counting system - from the first day of the last menstruation you need to subtract 3 months (April 1 minus 3 months = January 1), then you need to add 7 days to the resulting date (1 + 7 = 8), the result is the estimated date childbirth, which your gynecologist will enter on the card.
The second calculation method is to add 280 days to the first day of the menstrual cycle.
But you can’t rely only on these calculation systems, because for some, a full-term pregnancy can last 38 weeks, while for others - 42, all this is within the normal range.
Multiple pregnancy, as a rule, ends earlier than the date calculated by the doctor.
How to correctly calculate the term of childbirth by movements. Folk omens
To determine the due date, you can use folk omen, which for many centuries, even before the development of medicine, helped expectant mothers.
Exactly in the middle of pregnancy, primiparous women first feel the movements of their baby - this significant event occurs, as a rule, at the 20th week.
Multiparous mothers identify tremors as early as 18 weeks. the walls of the uterus after childbirth become thinner, and therefore more sensitive, therefore, the second / third / fourth time intrauterine movements are perceived better.
By the time of the onset of intrauterine movements, you need to add 20 and 22 weeks for the first and subsequent pregnancies, respectively.
But this method is not very accurate either, because girls with different builds feel tremors at different weeks, a thin woman feels movements inside herself already at 15-16 weeks, and a denser woman at 21-22 weeks.
It is worth adding that not all expectant mothers can immediately correctly evaluate incomprehensible movements inside themselves - some confuse this action with an intestinal disorder, sorry, or movement of the abdominal muscles (a weak cramp).
You can also determine the approaching birth already in the last trimester - by lowering the tummy. This process makes pregnant women feel a little better and takes place 2-4 weeks before delivery.
Calculate due date by ultrasound
Another method for assessing the term of childbirth is computer diagnostics, or more simply, ultrasound. In the early stages (up to 12 weeks), ultrasound can accurately determine the day of conception, based on the size of the head and torso of the embryo.
Up to a certain point (approximately 3-4 months of pregnancy), all babies develop in the same way, after which the genetic predisposition, the mother’s diet and lifestyle affect.
Ultrasound examination in the second and third trimesters will have an error of up to 2-3 weeks, because the children are different and the weight of newborns can vary from 3 to 5 kilograms.
Inexperienced gynecologists can use the date calculated by the computer as a basis, and after the "estimated 40 weeks", begin to take unnecessary measures in connection with the "delayed" pregnancy.
Finally, almost as accurate as an ultrasound can be considered a gynecological examination on a chair.
An experienced doctor by the size and shape of the uterus will be able to determine the gestational age by touch, based on which further calculations will be made, which we determined at the beginning of the article.
It should be borne in mind that you cannot rely one hundred percent on any of the listed methods, they are approximate and give a result that can vary by 2 weeks in one direction or another. It is worth focusing on your feelings and nature, which is never wrong.
