There are many reasons for miscarriage, such as poor embryo quality, low progesterone level, serious pregnancy complications, such as gestational diabetes, gestational hypertension, intrauterine hypoxia, congenital chromosomal abnormalities, genetic mutations, intercourse in early pregnancy, strenuous exercise, collision with abdomen, etc., as well as the influence of external harmful substances such as mercury, lead, cadmium or toxic environment and luteal dysfunction and low thyroid function in pregnant women. Factors that can easily cause spontaneous abortion. Therefore, in the early stage of pregnancy, we should pay attention to physical examination, check whether there are infectious diseases and other conditions, and then make adjustments according to the specific conditions of the body. In the early and late pregnancy must not have intercourse, wear flat shoes and not high heels to prevent falls and collisions with the abdomen, affecting the normal growth and development of the fetus.