Pregnant women should not have intercourse even if they have sexual desire at 12 weeks, they can divert their attention by doing outdoor activities and reading books. During pregnancy, the hormone level in the pregnant woman’s body will continue to rise, resulting in increased sensitivity of pregnant women, increased libido, which is a normal physiological phenomenon, 12 weeks pregnant in the early stages of pregnancy, the development of the fetus is still unstable, cohabitation has the risk of miscarriage, at this time it is not appropriate to cohabitation, the pregnant woman should be through the outdoor activities, reading books, listening to music, doing handicrafts, etc. to divert attention. Into the middle of pregnancy after the growth and development of the fetus tends to stabilize, pregnant women without such as no cervical opening relaxation, placenta previa and other issues, can be appropriate for sex, but must be gentle, pay attention to reduce the number of coitus. Pregnant women in late pregnancy should not have intercourse, so as not to induce preterm labor. If a pregnant woman has a need for sex, it should be carried out under the guidance of a professional physician, and should not be blindly coitus, so as not to lead to adverse consequences.