It is possible to have sex during pregnancy, but not during the whole pregnancy, in the early and late pregnancy is not allowed to have sex, because in the early pregnancy embryonic development is not stable, sexual stimulation is easy to cause miscarriage. In late pregnancy, the fetal body is larger, sexual stimulation is likely to cause uterine contractions leading to premature delivery, and it is easy for sex to cause pathogenic bacteria invasion leading to premature rupture of the fetal membranes and other risks to the safety of the fetus. In early pregnancy and late pregnancy, men should try to understand women restrain sex. In the middle of pregnancy can be moderate sex, the fetal development is more stable and the fetal body is not too large, but pay attention to the frequency of sex is not too high, so as not to make the pregnant woman overworked, which is not conducive to the development of the fetus, pay attention to sex when not pressing the uterus parts, the action amplitude is not too large, pay attention to the hygiene before and after sex.