The masturbation during pregnancy is prone to miscarriage, mainly from the following aspects: first, the vaginal environment of women after pregnancy changes, resistance decreases, while the resistance of the entire body of the patient is reduced, masturbation is prone to infection leading to vaginal or cervical inflammation, if the inflammation causes upstream infection leading to pelvic inflammatory disease, it is easy to miscarriage, stillbirth and other abnormal conditions. Second, women masturbate during pregnancy, if the strength is too much easily stimulate the cervix cause uterine contraction and lead to miscarriage, especially in the first trimester and the second trimester of pregnancy, the chances of miscarriage will be higher in these two special periods. The third, the girl masturbation during pregnancy, if you reach the climax there may be a contraction of the uterine muscle layer, easily lead to miscarriage, women if pregnant with abdominal pain bleeding or placenta position low and other pre-eclampsia miscarriage situation, the uterus is unusually sensitive, absolutely not masturbate.