It is generally not recommended to have intercourse during the seven and a half months of pregnancy. After the seventh month of pregnancy, the placenta is larger and sex may cause premature rupture of the fetal membranes due to external impact or, in more serious cases, placental abruption, which may lead to premature delivery of the fetus. If the frequency of intercourse is too high, it is easy to cause vaginal infection, which can lead to retrograde fetal membrane infection and many complications, resulting in more serious adverse consequences. Therefore, it is recommended not to have intercourse in the second trimester of pregnancy, especially for pregnant women with a history of post-pregnancy abdominal pain, pre-eclampsia, preterm labor and uterine body surgery. If you want to have intercourse at this time, you need to pay attention to hygiene and use condoms before intercourse, pay attention to the position of intercourse, choose a suitable position, avoid pressure on the abdomen of pregnant women, time and strength should be strictly controlled to avoid accidents.