There is no need to use condoms during sex during pregnancy because the patient is unlikely to have another pregnancy during sex during pregnancy, even if there is prostate fluid flow or internal ejaculation. The actual fact that the patient’s estrogen and progesterone levels are particularly high during pregnancy, the cervical mucus secretion is more and thicker, and it is very difficult for sperm to penetrate. Patients will not ovulate during pregnancy, so they do not need to wear condoms during intercourse and do not need to take any contraceptive measures. However, we must be careful not to have intercourse during the first and second trimesters of pregnancy, as these two stages are sensitive and can easily lead to miscarriage during intercourse. It is important to pay attention to hygiene when having intercourse to avoid infection, because the vaginal resistance of the patient is low after pregnancy and infection can easily occur if care is not taken. If the patient has a low placental position, abdominal pain, bleeding and other conditions of pre-eclampsia during pregnancy, intercourse should not be performed at any time.