If the fetus is not stable in the early stages of pregnancy, try not to have intercourse. If the will is very strong and the pregnant woman and the fetus are not abnormal, you can have intercourse moderately. There is a certain relationship between intercourse and miscarriage and premature birth during pregnancy, but it is not the direct cause of miscarriage and premature birth, it can only be considered a precipitating factor, and the chance of miscarriage caused by moderate intercourse is very small. On the contrary, choosing the right position and paying attention to related matters also help pregnant women to maintain a relaxed state of mind, reduce discomfort during pregnancy and enhance the relationship between husband and wife. The intercourse during pregnancy should be moderate, specifically to control the number of intercourse, each intercourse time to be short, shallow insertion site, the action should be light, the specific to control to which extent, there is no definite, to the comfort of pregnant women prevail. Secondly, before and after intercourse should pay attention to hygiene, both sides wash their hands and external genitalia to reduce the risk of infection. In addition, special attention should be paid to avoid blowing during oral sex, because the air entering the vagina may cause air embolism if it accidentally enters the blood vessels, and in serious cases, pulmonary embolism occurs in pregnant women, which is very dangerous. However, in the early stages of pregnancy when the fetus is not stable, it is recommended to strictly avoid sexual intercourse if the following conditions exist Such as unexplained vaginal bleeding, previous history of miscarriage or preterm delivery, current preterm miscarriage, low placental state, cervical insufficiency, hypertension during pregnancy, twin or multiple pregnancies, history of cesarean section or myomectomy, and inflammation of the reproductive tract in both partners. In conclusion, if the indicators of the pregnant woman and the fetus are normal in the early stage of pregnancy, you can have intercourse moderately, but you should try to avoid orgasm and choose to ejaculate outside the body at the same time, because nipple stimulation, orgasm and prostaglandins in semen can cause uterine contractions, which are generally lighter and may induce miscarriage in heavy cases.