Early pregnancy coitus will have the consequences of gynecological diseases, such as vaginitis, cervicitis, and so on, and in serious cases will lead to miscarriage. It is recommended that pregnant women in early pregnancy to avoid sexual intercourse and strenuous exercise, to ensure balanced nutrition. Early pregnancy pregnant women due to hormonal changes in the body, will lead to pregnant women vaginal self-cleaning function decreases, this time coitus is easy to induce bacterial infection, will increase the pregnant woman suffers from vaginitis, cervicitis, endometritis and other gynecological diseases. In addition, early pregnancy pregnant women due to the formation of the gestational sac just, the placenta is not yet fully formed, the gestational sac is not yet solid, this time cohabitation may cause uterine contraction, which will lead to the phenomenon of pregnant women with preterm abortion. Pregnant women in early pregnancy should try to avoid sex, ensure adequate rest, avoid strenuous exercise. Pregnant women in early pregnancy should eat a balanced diet, can eat apples, milk and other foods rich in vitamins and protein. Therefore, coitus in early pregnancy may lead to gynecological diseases as well as the consequences of miscarriage, it is recommended that pregnant women should avoid sexual intercourse in early and late pregnancy.