The volume of the uterus by the end of pregnancy is increased approximately 500 times. Changing the size of the uterus is due to increase in size of muscle fibers under the influence of hormones of the placenta. Blood vessels dilate, the number of them increases, they seem to entwine the uterus. A decline in the uterus, that by the end of pregnancy become more active and felt as "Compression". Such normal uterine contractions can be considered as training exercises in front of her upcoming work in childbirth.

Regulation of the uterus varies in accordance with its growth. By the end of 3 months pregnancy, she goes beyond the pelvis and is closer to the genera reaches hypochondrium.The uterus is held in the correct position in bundles, which thicken and stretched during pregnancy. Pain arising from sides of the abdomen, especially during changes in body position, often caused stretching ligaments. Blood supply of the external genitalia increases, and here may appear varikizno veins. Due to the difficulties outflow blood on the legs and varicose veins may appear, which requires certain activities.

The growth of the fetus and the physiological changes in pregnant affect its weight.Healthy woman by the end of pregnancy, body mass increases an average of 12 kg with a range from 10 to 14 kg. Usually in the first half pregnancy, it increased by 4 kg, in the second half - 2 times more. Weekly weight gain up to 20 weeks is about 300 +30 g, from 21 to 30 weeks - 330 + 40 g and after 30 weeks before delivery - 340 +30 g. In women with a deficit body weight before pregnancy weekly weight gain may be even greater. For pregnancy adapt not only the physical body functions, but psychology of women.At the ratio of women to pregnancy and childbirth have Various factors, including social, moral, ethical, economic, etc. This ratio depends on the personality characteristics most pregnant. Typically, women have emotional changes during pregnancy state.If in the first half of pregnancy, most women worry concern and anxiety about their own health, in the second half, especially After stirring of the fetus, all the thoughts and concerns are directed at the welfare of the fetus, which is perceived as a separately existing entity. Expectant mother often turns to him with gentle words, she imagines, giving child's individual characteristics. In addition, women have sense of loss of its past attachments and habits for the sake of the forthcoming motherhood, there is doubt about the loss of attractiveness, changes in the relationship with her husband.