During the last month of pregnancy, each fetus does not gain exactly the same amount of weight, but it is basically in the range of 1-1.5 pounds. The exact number of pounds gained needs to be calculated in conjunction with the fetal biparietal diameter, abdominal circumference and femur length. After the fetus reaches full term and the due date is near, the blood supply to the placenta decreases, physiological function decreases, and weight gain slows down relatively. In early pregnancy, fetal development is the slowest in the entire pregnancy, during which the fertilized egg divides to form an embryo, which then develops into a fetus. In the mid-pregnancy, the development of the fetus gradually accelerates, starting from about 16 weeks of pregnancy, it can grow 50g per week, 100g per week after 22 weeks, 150g per week after 26 weeks, and then enters into a period of rapid development, it can grow 200g per week. in the late stage of pregnancy, after the fetus has reached full term, due to the function of the placenta decreases, the weight does not continue to grow, on the contrary, it may be decelerated, and it can grow 150-180g per week. 150-180g. late pregnancy must not be strenuous exercise, do not do splits and other dangerous actions, pay attention to the intake of vegetables and fruits, so as to avoid constipation problems caused by hemorrhoids after delivery. Do not be alone during this period, so as not to start the fetus at any time, if there is a regular pain in the lower abdomen or vaginal water symptoms, may be the precursor of labor, should be hospitalized for observation.