The first is that intercourse in the early stages of pregnancy when the fetus is still unstable can bring great harm, mainly: first, intercourse in the early stages may cause infection in the vagina of the pregnant woman, in the early stages of pregnancy when the development of the fetus is relatively fast and critical, carelessness may lead to fetal malformation. Secondly, if you have intercourse in the early stages of pregnancy, the uterus of the pregnant woman will contract strongly during orgasm, and if the male action is too rough, it may lead to miscarriage of the pregnant woman. Third, intercourse during pregnancy may cause discomfort to the pregnant woman, such as pain in the abdomen or vaginal itching, which can cause vaginal bleeding when it is more serious, so you need to go to the hospital to consult a doctor and have an ultrasound to rule out the possibility of miscarriage.