First, let's take a look at the events that are happening with the future mother and her child in the last period of pregnancy, and we will try to determine the forthcoming date of birth.
As a rule, the bearing of the child lasts 40 weeks or 280 days from the last menstrual period of the woman. It is from this date that you can take three months and add another seven days. This will be the expected date of birth of your baby.
For a more accurate definition of this period, remember the date of the first stirring of the fetus. Usually pervorodjaschie future mothers, these movements feel on the 20th week of the term, and the spontaneous - somewhere in the 18th week of pregnancy.
The date of birth can also be determined by a doctor based on the results of ultrasound diagnosis of the fetus. It is believed that the pregnancy is completely terminated after 37 weeks, that is after 259 days and up to 42 weeks (294 days).
Traditionally, labor for up to 37 weeks in medicine is considered to be early, and after 42 weeks - late. With the end of physiological pregnancy, the child in the womb of the mother becomes stronger and appears to be healthy, with fully formed tissues, organ systems. If we talk about pregnancy, it is necessary to take into account the risks of traumatizing a girl or a boy in the process of giving birth. It is also possible to give birth to a dead child when it is repainted for ten days or two weeks. That's why doctors decide to stimulate the labor of a pregnant woman who does not have contractions at the right time. Traditionally, a pregnant pregnancy is easier to prevent than to stop the process of premature birth.
So, on what week do women give birth prematurely? In the practice of obstetrics, certain time intervals for the possible onset of premature delivery have been identified. This gestation period is 22 weeks, from 22 to 27 weeks, from 28 to 33 weeks, from 34 to 37 weeks.
Previously, doctors fought for the lives of babies, who were born prematurely from the 28th week of pregnancy and at their weight of one kilogram. Now these figures are much smaller.
The causes of premature birth can be infections of the genitals, too large a fetus or multiple pregnancies, polyhydramnios, various defects of the uterus, detachment or placenta previa. Less often the cause of premature births are problems with the kidneys, pituitary gland, thyroid disease and cardiovascular system. Then the future mother's body protects itself by rejecting the fetus as a threat to health.
If the child is born on the 22nd-27th week, then it is too difficult to predict its viability, because most of its organs are not yet formed and are not prepared for development outside the womb of the mother.
In practice, from the 27th week of pregnancy to the 36th week, most pregnant mothers achieve prolongation of pregnancy. And even with incompletely developed lungs in a child, their maturation can be speeded up with medical preparations. Therefore, at such times, babies survive more often. As a rule, positive predictions are given to babies, who were born in weight of 1, 5 kg, because their internal organs are better formed.
By the way, twins or twins are born in 37-38 weeks. Earlier, give birth to second-rate mothers. Today, according to medical statistics, every third future mother gives birth at 37 weeks of pregnancy. Rarely occur at 40-42 weeks.
So, when your son or daughter is born, you can only determine approximately. After all, this process is purely individual, as is the period of gestation, its features and pathologies. The most important thing is to have a strong, healthy boy or girl born.