How the fetus develops in the third trimester of pregnancy
How the fetus develops in the third trimester of pregnancy
Pregnancy lasts an average of forty weeks. This time is usually divided into three terms. The third trimester of pregnancy is final. It begins with the twenty-eighth week and ends with childbirth.
At 28 weeks, the body length of the baby is 35 cm, andits weight is a little more than a kilogram. By the end of the third trimester of pregnancy, fetal growth reaches 50-55 cm, and weight - three to four kilograms. In the third trimester, the child has already formed all the vital organs, so most babies born even prematurely after 28 weeks, thanks to the care of experienced doctors, survive and do not have deviations in development. During the third trimester of pregnancy, various organs, in particular, the lungs and nervous system, accumulates subcutaneous fat. It is during this period that the most active set of body weight occurs, the skin of the baby is smoothed and acquires a pinkish color. As a rule, a few weeks before childbirth, the baby turns head down, what is called the head presentation. This placement of the baby in the uterus is most favorable for natural childbirth. In about five percent of cases, the fetal head may remain at the top, or the baby is placed across the uterus. The fetus's trichomes in the third trimester of pregnancy become so strong that they can be seen even from the outside. By 36 weeks of gestation, the movements become smoother and more like somersaults and overturns. In the third trimester of pregnancy, the fetus performs training movements with the diaphragm and the abdominal wall, but more often for the mother these movements go unnoticed. But the hiccup of the fetus can not be confused with jerks and somersaults, it is very well felt by a pregnant woman. In the last month the fetus descends, penetrating its head lower into the mother's pelvis. This happens most often two to three weeks before the birth.
