In what cases are we say that the baby was born on time, and when early or late childbirth testify to pathologies? How many weeks the pregnancy lasts in women, it is impossible to say, since each child is individual and decides on his own when to be born. However, there are those who are subject to most of the future mothers.
Well-known 9 months - a rounded term of the average duration of pregnancy, which is not used in obstetrics and gynecology. Doctors count pregnancy, how many days it lasts, adding to the date of the beginning of the last period of 40 weeks, or 280 days.
The gynecologist already determines in the initial treatment of pregnant women in female consultation. Then additional research is carried out (blood test for hong hgch, ultrasound), according to the results of which the term of the baby in most cases is adjusted.
Doctors use a unified system for determining the duration of pregnancy. Obstetrician term originates from the first day of the last menstruation. There is also a concept of the embryonic period when gynecologists are counted if it is known to be known. However, in all medical records, the number of obstetric weeks is indicated.
If the date of conception is unknown, in the calculations of the doctor may be errors to 1.5-2 weeks. This is due to the early or too late onset of ovulation in a particular woman. In addition, the rate of fertilization of the egg directly depends on the mobility and viability of sperm, because men's and female cells can even meet after 2-5 days after sexual intercourse.
The period of tooling the child, from the moment of conception until the baby appears on the light, lasts 266 days, or 38 weeks. Since the day of conception is known to the woman not always, the time interval increases somewhat: from the first day of the latter before the pregnancy of menstruation to childbirth. In accordance with the Rule of Nemele, adopted in obstetrics for settlements, this period is 280 days, or 9 calendar months.
This is the average duration of pregnancy, childbirth occurring from 36 to 42 weeks is not considered pathological. The whole period is made to divide by 3 trimesters. The first lasts from 1 to the end of 13 weeks, the second - from 14 to the end 27, the third - from 28 to 40.
Each woman wants to know exactly the date of birth, it allows you to worry about less and fully prepare for an important event. When registering in the female consultation, the future mother hears from the gynecologist about the obstetric and embryonic period of pregnancy, let us understand what it is and how not to confuse in the concepts.
The standard menstrual cycle is considered to be the period of 28 days. Ovulation falls on the 14-15 day of the cycle, it is in this period that conception is possible. The obstetric weeks begin to counted from the first day of the last menstruation when the conception has not yet come.
The embryonic term is considered from the moment of conception. It is difficult to establish exactly, because no one knows when the egg fence occurred exactly. It may not coincide with the intercourse time, since spermatozoa retain activity in pipes up to 5-7 days. For women leading a measured sex life, the calculation of embryonic weeks is difficult.
The score in the obstetric weeks is accepted long, it is more convenient and more accurate for the gynecologist, especially if the cycle is longer or shorter than standard. The full obstetric month is just 28 days (4 weeks), and the entire period of pregnancy, on average, - 280 days, or 10 obstetric months. The difference between the embryonic and obstetric period of pregnancy is 2 weeks.
Find out the exact time of fertilization is most often not possible, since to trace the moment of the exit of the egg from the follicle or the date of its introduction in the epithelium of the uterus is almost impossible. Theoretically, you can approximately track such moments using a constant measurement of basal temperature before and after ovulation.
Also, it is also impossible to focus on the exact time of conception, because after the act of fertilization before the introduction of an egg in the uterus can pass several days. All the physiological processes of conception in women take place differently in different times, therefore all individual characteristics are taken into account in medical practice.
Doctors gynecologists are used to calculate the so-called obstetric weeks. This method is the easiest and relatively accurate, based on the knowledge of almost any female start and ending date.
Calculate the term of pregnancy Every woman can independently, if he knows the date of his ovulation. This is the only day in the month when pregnancy can come. In fairly rare cases, ovulation comes twice for 28 days of the cycle, in this case the female cycle undergoes changes.
Calculate the day of ovulation is quite simple - it is necessary to add exactly 14 days to the first day of the menstrual menstrual cycle. On average, the female cycle lasts 28 days. It turns out that ovulation occurs just in the middle of the cycle.
If you calculate the duration of pregnancy from the day of ovulation, then it turns out that the baby tool lasts 266 days. This is a normal docking pregnancy. In the same way, you can predict the date of delivery.
Note! This method of calculation differs from obstetric. Doctors use their own method of counting female pregnancy. In medicine, the lunar months are going to the last period of 28 days. This period is similar to the women's menstrual cycle. Therefore, according to medical calculations, the pregnancy lasts almost 10 months.
Know the exact period of pregnancy is important for every future mother, the release time depends on the decree, preparation for the birth of a child and a lot more. There are several ways to learn an approximate date of conception, as well as factors affecting the duration of the nipping. What can threaten the premature or transferred pregnancy of mother and baby, how to try to avoid it - I suggest you learn from the article.
We used to assume that pregnancy lasts 9 months or 40 weeks, but both of these options are not entirely true. Most often from the moment of conception before the birth of a child takes about 266 days, that is, the pregnancy lasts 38 weeks from 80% of women. The date of birth is because it is called the estimated (PDR) that in most cases it becomes a surprise, because it is difficult to calculate it difficult, even knowing the day of conception. It is impossible to predict how much time will need an egg for fertilization and subsequent consolidation in the uterus. Many mothers do not know what day the conception occur is that, in general, normally for people leading active sex life.
Women with a regular menstruation cycle in 28 days is easier to calculate the approximate date of birth, you need to add to the day of the start of the latter before conceiving menstruation 280 days
Therefore, the PDR is calculated, focusing on the beginning of the last menstruation before pregnancy. Ovulation - the day of the exit of the egg for fertilization - occurs on the 14th day of the monthly cycle. Conception can occur and a few days after sexual intercourse, because with favorable conditions, spermatozoa remains suitable for fertilization for about a week. If you count 280 days from the day of the beginning of the monthly, you can get an estimated date of delivery (14 days before ovulation and 266 after). Forty weeks of pregnancy is a period that obstetrics Gynecologists consider the norm. But in fact, the first 2 weeks of them is not pregnant.
errors in the calculation arise due to the difference in the duration of the menstrual cycle, some women have 24 days, from others - up to 34. Consequently, ovulation occurs before or later than the ladies with a duration of the cycle at 28 days taken by the average. Sometimes the child is born day per day according to plan, but it is no more than a simple coincidence. Normal docking pregnancy is considered to be the one at which childbirth occurred after 37, but up to 41 weeks of to wear.
My close girlfriend Oli 13 years ago there was a funny episode. Well, as funny, now I remember with a smile, and then Lelen was not to laughter. She just got married and, after 2 months, he learned that he would soon be mom. The joy of her husband was not limit until he saw a week a week more than their family life. The arguments of the spouse that married a girl was not very convinced by Zhenya. I had to hold with me to the doctor, who explained the future father, why the difference was turned out on the date and date of the wedding. If the Bear was born not a fiery and growl and with heels, like Dad, Eugene doubted, according to him, so far. This is how the definition of pregnancy on the menstrual cycle almost destroyed the new family.
We found out that more than 2/3 of pregnancies from conception before childbirth lasts 266 days, it was time to learn about the factors causing deviations from the norm in one direction or another. The reasons for the fact that the battery is larger or less than 38 weeks:
This question in women is one of the most painful. At first glance, it is quite difficult to answer that it is that it is possible to shift the deadlines in one direction or another, but the factors of influence still exist. Let's look at them in more detail.
Premature are the birth of the childbirth that occur from 22 to 37 weeks of pregnancy. You should not focus on the notorious 40 weeks, as the deviation from this date for a couple of weeks to any side is not a pathology, childbirth from 37 weeks to 42nd will be considered urgent, that is, what is happening on time.
That is, it is not clear what it starts in the female body a generic activity, when neither the baby nor my mother is ready for it: there is no needed level of certain hormones, there is no proper ripening of light tissue in the kid, etc.
However, there are sufficiently studied risk factors that increase the likelihood of having crumbs before the time. They are conventionally divided into maternal, gestational and socio-biological.
Doctors did not find a new risk factor for so long ago - the male floor of the baby. Exactly and argued this connection is not proven, but statistics are extremely impartial: up to 75% of born ahead of time - boys.
The consequences of premature births directly depend on what caused the baby was born. The closer to 37 week, the higher the likelihood of a favorable outcome without complications. The earlier the child appears, the higher the probability of his death or disability.
Modern medicine stepped far forward in the rescue issues of premature children. Earlier, the baby with a weight of less than 500 grams did not even try to save, considered the miscarriage. Today, from different points of the country, there are reports from time to time that they managed to save children weighing 450 and even 420 grams.
Resuscitation is at a high level, and therefore the majority of children born ahead of time, save, but for the consequences that may exist in terms of their health, alas, no one will vouch. All this indicates the need to prevent premature childbirth - a woman should be very attentive to his well-being and fulfill all the recommendations of the doctor.
If the period specified as the estimated date of birth was held, and the baby is not in a hurry to make the mother and other relatives in their appearance on the light, do not rush to the conclusions - up to 42 weeks the pregnancy is considered not transferred, but prolonged. There is talking about tooling in obstetric understanding when 42 weeks of pregnancy are, and there are no signs of labor.
It is believed that the length of the baby is equal to 40 weeks. However, the infant is often born before the established period, but doctors do not consider it premature. Sometimes obstetrics even try to speed up the childhood due to the fact that the kid too "stopped" in the maternal womb. When is the fruit considered completely ready for birth?
Throughout the length of the toal, the child is constantly developing. For the first few weeks after fertilization, it reminds little reminiscent of the newborn. The entire first trimester in the baby is the bookmark of internal organs and systems. By the 14th week, all major bodies are already formed, but they are not able to function outside the maternal organism.
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Pregnancy after miscarriage :: :: Page 3