Sexual intercourse is not recommended at 29 weeks of pregnancy, which is the late stage of pregnancy. If sexual intercourse is performed, it may cause sexual stimulation and induce abdominal pain, vaginal bleeding or vaginal fluid in pregnant women, which may easily increase the risk of preterm delivery. It also predisposes the pregnant woman to inflammation of the reproductive tract, which in serious cases can trigger placental abruption and cause serious consequences such as intrauterine bleeding. In addition, the first trimester is also a high-risk period for miscarriage, and sexual intercourse is not recommended. In the middle of pregnancy, the fetus is relatively stable in its development, so you can have sex appropriately. In addition, there are some pregnant women with low placenta who should not have sex because in patients with low placenta, vaginal bleeding may occur after sex. If you have intercourse at 29 weeks and have abdominal pain, vaginal bleeding or vaginal discharge, you should go to the hospital for fetal preservation treatment in time. Intravenous magnesium sulfate is usually needed to suppress contractions, and the vaginal bleeding should also be monitored. If the vaginal bleeding is heavy, oral iron supplementation is recommended, as well as prevention of infection, disinfection and care of the perineum, and oral or intravenous antibiotics.