It is not recommended to have intercourse during early pregnancy, as the immunity of pregnant women is low and the fertilized egg is still unstable when it has just been laid, so intercourse at this time is prone to complications of infection and even miscarriage. In addition, the early pregnancy reaction is obvious at this time, and intercourse will aggravate the early pregnancy reaction. 1, pre-miscarriage: early pregnancy is not stable after the fertilized egg is bedded in the endometrium, which will easily cause uterine contraction causing miscarriage; 2, aggravate the early pregnancy reaction: due to changes in hormone levels and increased sensitivity of the uterus, pregnant women in early pregnancy may experience nausea, vomiting, drowsiness, weakness and other early pregnancy reactions, and intercourse at this time may lead to aggravation of early pregnancy reaction; 3, infection: early pregnancy is not recommended. 3, infection: the resistance of pregnant women in early pregnancy decreases and vaginal secretions increase, so intercourse may increase the probability of infection and cause vaginitis and other diseases. The middle of pregnancy can be appropriate for intercourse, but the action should not be violent, and the time of intercourse should not be too long, and men should pay attention to avoid squeezing the pregnant woman’s stomach. Pay attention to hygiene during intercourse to avoid infection, and wash in time after intercourse to ensure that the perineum is clean and dry. If the pregnant woman has abdominal pain in the middle or after the intercourse, she must go to the hospital in time to avoid danger to the pregnant woman and the fetus.