Almost immediately after receiving a positive result of a pregnancy test, women are thinking about when they give birth. This date is important, as a reference point, a direction that will help better understand how much it remains, as well as plan to work and prepare for the birth of crumbs. The estimated date of birth is important for doctors. There are several ways to calculate it - according to the last menstruation, by the date of conception, on ovulation. How to do this in practice, this article will tell.
The estimated date of childbirth is considered not only so that future parents can give the "sacraticles" and choose a child name, as well as plan a father's vacation. DRD is an important landmark that needs to attend the doctor and the most woman to track the dynamics of pregnancy, planning the method and method of the delivery.
The estimated date of childbirth is not accurate, so do not treat it as the date of birth of your child. When the day of childbirth comes, medicine, alas, it cannot be predicted. Birth is a very complex and multistage physiological and biochemical process, to begin with complete readiness and mothers, and the fetus. And it is necessary to calculate the DRD only to know the approximate time segment, which will happen to the day of delivery.
Normally, docking children are born in the period from 38 to 42 weeks of pregnancy inclusive. The duration of childbirth may fall on any of the days during this time. Only every twentieth baby is born strictly in the DA, the rest prefer to present their parents to their emergence with their appearance or earlier or later the deadline specified in the Mom exchange card as a PDR.
Clear the required calculation can be in two ways - independently with a calculator and calendar, or with a pregnancy calculator that runs online. The calculator will help save time, as it allows you to calculate the required date per second. The calculation algorithm is the same as during independent calculations and when using the calculator. It is based on the obstetric method of calculating the period of pregnancy.
This means that it is not considered to consider the PDR not from any day, namely from the first day of the last menstruation. This calculation is considered the most correct method. The fact is that the day of the beginning of the latter before the "interesting situation" of menstruation is the only precisely known date, and all the others are simply impossible to determine up to the day. The term of pregnancy in obstetric standards is calculated from the first day of menstruation, considering this day the first day of pregnancy.
As soon as a woman sees two stripes on a pregnancy test, the question of when to wait for the election in the family is almost immediately. The date of childbirth - a landmark that helps a woman is more efficient to plan the remaining time, prepare for the birth of a baby, to make adjustments to life, to complete repairs to the apartment by this time and make all the necessary purchases. Determining the date of delivery - the process is delicate and having his own nuances.
This abbreviation is well familiar with all women who were pregnant. For future mothers, it has a practically magical meaning. DA is the alleged day of childbirth. Why supposed? Because the exact date of childbirth (your child's birthday) no one can know in advance. There is no such method of medical diagnostics that could say for sure when the baby will appear. The only exception to the rules is a planned caesarean section, but in this case the period of operation is usually appointed shortly before the delivery. The rest of the time in the map of the woman also specified PDR.
Estimated day of birth is the last day of 40 weeks of pregnancy, its completion. It is considered an approximate guideline for the future mother and doctors. In practice, the child can be born on any other day at the interval between 38 and 42 weeks, and it will be completely normal.
Birth - a complex physiological process in which all systems participate, hormonal background, muscles and tissues, and therefore labor will begin when mom and baby will be ready. There is not a single method in the world who would allow to predict when this day will come.
Determine and calculate the estimated day of birth can be several methods both independently and with the help of a convenient Calculator-online. The algorithm for calculating in both cases is the same. It is based on the obstetric method for determining the deadlines - by the date of last menstruation.
Having learned about your pregnancy, every future mommy wants to accurately calculate the date of birth and find out the day of the meeting with your baby. For some curiosity, it is determined by the desire not to get to the hospital at the "wash" or during the holidays, others are waiting for the "beautiful" date on the testimony of their child's birth, the third is worried about the father of the kid - will the child's dad arrive with the watch for birth?
There are two ways to calculate the development of the embryo: obstetric - from the first day of the last menstruation and the embryonic - since the exit of the egg in the abdominal cavity. In women's consultations, the first method is used. But knowing the day when ovulation occurred, and therefore the date of conception, you can get a more accurate result.
A small arithmetic action will make it possible to make calculations in a matter of seconds: you only need to add 266 days to the date of conception. Why exactly 266? The fact is that the duration of the average pregnancy is 280 days straight from the beginning of the last menstruation. The average menstrual cycle lasts 28 days, and ovulation, as a rule, occurs in the middle of the cycle - after 14 days. It is these two weeks that are not taken into account when determining the day of delivery by the date of conception.
Knowing that in the womb of the mother, the embryos lives 10 lunar months (1 lunar month is 28 days) also allows you to calculate the exact date of delivery. The definition of this day is as follows: 40 weeks are added to the date of conception or 10 times to 28 days. And from the resulting date, 14 days is taken away - the time that passes before the exit of the egg.
There is a neglect formula, which is used by doctors as an alternative way to determine the date of delivery. The subtraction of exactly three months is needed from the date, which falls on the number when the week passed from the last menstruation. How it is calculated can be understood by example: the first day of the last menstruation - April 1. Referring from this date 3 months and adding a week to the resulting day we get that the approximate date of birth in this case is January 7.
a small adjustment requires a calculation in a month, in which the exact date of ovulation is known. In this case, after subtracting a three-month period, it is necessary to add the number of days traveled from the last menstruation before the onset of ovulation. It is worth noting that the formula of the Nemele can give an error in determining the "date x" in 3-5 days. It depends on the duration of the menstrual cycle:
On this time, the woman notes that she did not come next menstruation. That is, now is the time to go to the pharmacy for pregnancy test! The result of your test is positive? We congratulate you! Most likely you are pregnant. For confirmation, go to the reception to your doctor Akuster-Gynecologist. From now on, it is necessary to refuse bad habits and remember that now you breathe, eat and drink for two!
Learning about your pregnancy, mommies are beginning to be interested when the long-awaited appearance of the baby will occur. There are many reasons for this. Some before conception tried to push the birth of one of the beautiful dates, other spouses work the rotational method and need to be at home during childbirth and the first week after them. Is it possible to calculate the date of birth, how to do this and how true the result will be, we will understand.
Based on your own experience, I will say that the accuracy of such computing is very controversial. But but not bad helps to distract from anxious thoughts by anticipation of the ambulance with the child. You can fantasize, what the weather will be outside the window on the birthday of your crumbs. I imagined the snow and in 2008 he really fell very early, the next morning after the birth of the son, I looked out in the Roadom window and saw a white bedspread, passing the land. Everything, of course, melted to dinner, but since then the first snow is associated with something joyful and long-awaited. And indifferent that this day did not coincide with the DA in the exchange card.
Pregnancy does not necessarily last exactly 266 days from conception or 280 from the first day of the last menstruation before conception. Each person is individual, if one one for full readiness for birth is 37 weeks enough, another can stay in the maternal womb of 41 weeks. As a rule, shortly before childbirth, pregnant women are seen similar symptoms, announced by the imminent joyful event:
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.
Women 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. Please note that it is the first day of the last menstruation, not the day of its end, as some think.
In a matter of seconds, the calculator shows, at 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 a woman, finding out its exact period, do not need to search for reliable medical information about him for a long time, rereading a lot of extra.
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, you do not need to guess how there, in the stomach, is the kid. 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.
The undoubted plus of such calculators is 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 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 most common method of determining the estimated date of delivery (DA) of childbirth is the countdown from the first day of the last menstruation: it is necessary to add 40 weeks to this number, or 280 days, - it is so much the average lasts a pregnancy. You can calculate and without a calendar: it is enough to take 3 months from the first day of the last day and add 7 days to the received date.
Why doctors oriented precisely on the last menstruation? After all, conception during this period if not impossible, then, at least, the least probably! The fact is that the monthly - a kind of evidence that at the moment the pregnancy has not come: after all, menstruation is the end of the next, "unsuccessful" from the point of view of fertilization, cycle. Since the next menstruation was no longer the next menstruation, it is logical to assume that it was in the cycle that comes after the last month, and a pregnancy has come.
The most likely moment of conception is ovulation - the yield of ripened eggs from the ovary. Usually this event takes place on the 12-16th day of the cycle, therefore, by 40 weeks of pregnancy, counted from the first day of the cycle, add more 14 days, or 2 weeks.
However, this method of calculating the date of birth has its errors: there is a slight chance that the conception has happened . before the last menstruation. This is possible in the event of an ovulation failure due to stress, taking hormonal drugs, climate change, significant physical exertion or diseases. And then the day of ovulation is shifted from the middle of the cycle (as it should be normal) closer to the following month.
If the conception occurred in 1 week (and less) before the next expected menstruation, the woman's body may simply do not have time to rebuild in the event of the coming pregnancy, and the monthly will still begin.
conception on the eve of menstruation, of course, represents the risk for the embryo and significantly reduces the chances of saving the coming pregnancy, but the probability that it will not be interrupted yet! During menstruation in the uterus, endometrial is rejected - the layer of the mucous membrane occurs, which in the event of fertilization should provide embryo protection, nutrition and oxygen. However, the embryo himself can be not yet in the uterus at this moment, but in the uterine tube, where there is no rejection phenomena and, accordingly, nothing threatens him.
Since the fertilization to the embryo hitting the uterus, there is an average of 4-6 days, and before its implantation (attachment to the uterus wall) - 7-14 days. During this time, menstruation can completely complete, and the wall of the uterus will begin to be covered with a new endometrial necessary for a prosperous implantation.
Thus, it turns out that it is 40 weeks from the first day of the last menstruation plus-minus 2 weeks. According to this calculation, timely, or, as it is customary to speak in obstetrics, "urgent" (from the word "on time"), childbirth can begin on any day from the 38th to the 42nd week, counted from the first day of the last period of menstruation. The most likely date is the "Golden Middle" of this period - 40 weeks.
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