How to calculate the time?
To establish obstetric pregnancy, a woman needs only to know exactly the date of the first day of her last monthly period. It is from this time and consider the duration of gestation of the physician.
In order to translate the months into weeks, their number must be multiplied by 4. If you count how many weeks are 9 months, then this is exactly 36 obstetric weeks.
What happens to the fetus at this time?
Having dealt with how many weeks this pregnancy is - a period of nine months, we will tell you about the changes that occur in the baby's body in this period.
By the end of the 36th week of gestation, the fetus is considered absolutely full. By that time his organs and systems are completely ready for life outside the mother's body. A sufficiently dense layer of subcutaneous fat allows to regulate the body temperature of a small organism, and also is a source of energy for it for several days after birth.
By this time, the body weight reaches 3000-3300 g, and the growth is of the order of 52-54 cm. The surface of the fetal body gradually begins to lose the hairs, the hair remains only on the head.
In the liver, there is an active accumulation of iron, which is necessary for normal hematopoiesis.
The baby himself takes his final position in the mother's womb. The head enters the cavity of the small pelvis. It is this presentation that is right. There is very little left until delivery. Recall that the appearance of the baby in the interval of 37-42 weeks is the norm.