After pregnancy, the body changes mainly in the uterus, breasts, weight, etc. If there is any special discomfort, it is recommended to consult a doctor in time. 1. Uterus: With the formation and development of the fetus, placenta and amniotic fluid after pregnancy, the uterus gradually enlarges and softens, mainly including: increased blood flow to the uterus, uterine blood vessel dilation, thickening, cervical congestion, and so on. 2. Breasts: During pregnancy, the placenta secretes a large amount of estrogen to stimulate the development of mammary gland ducts and a large amount of progesterone to stimulate the development of mammary gland follicles, which is mainly manifested in the enlargement of nipples and deepening of areola color. 3. Weight: The average weight gain during pregnancy is about 12.5kg due to the uterus and its contents, breasts, increased blood volume, interstitial fluid, and maternal fat and protein.