25 weeks of pregnancy belongs to the middle of pregnancy, the development of the fetus is more stable, if the pregnant woman is in good health can be appropriate intercourse, but there are the following precautions: 1, if the pregnant woman’s placenta position is too low, or vaginal bleeding, can not intercourse, so as not to cause bleeding aggravation; 2, the number of intercourse should not be too frequent, the action is not too intense, so as not to cause abdominal pain; 3, before and after intercourse to do a good job of pubic hygiene, to avoid allowing The uterus is subject to bacterial attack, but also in the intercourse with condoms; 4, pay attention to the posture, avoid squeezing the pregnant woman’s stomach, you can take the side lying position, so as not to cause great impact on the health and safety of the fetus. Under normal circumstances, pregnant women having sex in the middle of pregnancy will have an impact on the fetus, but if the pregnant woman has a history of preterm labor, or there are other problems during pregnancy, such as shortened or dilated cervix, amniotic fluid outflow, placenta praevia, vaginal bleeding, a history of miscarriage, it is recommended to avoid intercourse during pregnancy as much as possible.