Sexual excitement in late pregnancy may affect the fetus, which may cause premature labor, retrograde infection, placental abruption and other adverse consequences. 1. Preterm labor: when having sex in late pregnancy, reaching orgasm will stimulate the uterus, leading to uterine contractions and spasms. If the uterine contractions are too strong, they may cause real contractions, leading to the emergence of preterm labor. 2. Retrograde infection: coitus in late pregnancy may stimulate the uterus, leading to premature rupture of the amniotic sac, amniotic fluid flow, bacteria may be retrograde infection, causing amnionitis, uterine infections and other conditions. 3. Placental abruption: If the uterus contracts too strongly during coitus in late pregnancy, it may also lead to premature abruption of the placenta, which is a more serious situation. Therefore, for the safety of the pregnant woman and the fetus, it is not recommended to have sex in late pregnancy. If a pregnant woman experiences discomfort such as abdominal pain during sex, it is recommended that she seek medical attention in a timely manner and under the guidance of her doctor, complete the relevant examinations to clarify the cause of the disease and treat the symptoms.