Masturbation during pregnancy has an effect on the fetus, especially in the early stages of pregnancy, the placenta is not yet fully formed, the embryo development is very unstable, easy to be affected by external adverse factors, the phenomenon of abortion. In the middle of pregnancy, the development of the fetus is relatively stable, not easy to be stimulated by the outside world, moderate masturbation does not have much effect on the fetus. But pay attention to hygiene to avoid bacterial infections, resistance to decline during pregnancy is easy to cause gynecological inflammation, pregnancy and should not use drugs will have an impact on health. Masturbation is prohibited in the second trimester of pregnancy, if there is a strong contraction of the uterus, there is a risk of preterm labor. During pregnancy by the hormonal influence of pregnant women libido will be enhanced, early and late pregnancy is best not to cohabit in order to avoid causing miscarriage or premature birth. Mid-pregnancy can be moderate coitus, but pay attention to the way the action can not be too big, can not press the pregnant woman’s abdomen so as not to cause adverse effects on the fetus.