Early pregnancy dream orgasm has little effect on the fetus, the uterus is not stimulated by the outside world, will not produce any adverse effects, the phenomenon of a priori miscarriage. Early pregnancy hormone levels increase, some women early pregnancy reaction is obvious, at this time the development of the fetus is still unstable it is best not to have sex, especially women with preeclamptic miscarriage is prohibited cohabitation. After the mid-pregnancy can be appropriate coitus, at this time the reaction of pregnancy has been reduced, the placenta development is more solid, pregnancy has entered a stable period and the protection of the placenta and amniotic fluid, can alleviate the pressure and stimulation of the outside world, at this time coitus generally do not appear adverse effects, but also pay attention to coitus way, do not have the ability to overdo it, can not oppress the pregnant woman’s abdomen. Pay attention to coital hygiene to avoid bacterial infection and gynecological diseases. Appropriate sex life during pregnancy will relieve the pressure of pregnant women, so that pregnant women are in a happy mood, which is conducive to the smooth passage of pregnancy.