Pregnant can cohabit, but pay attention to grasp the time of sex, the first three months of pregnancy and the second three months of pregnancy can not cohabit, mid-pregnancy can cohabit. Pregnancy is a special period of time, generally the first 3 months of pregnancy to avoid sex, early pregnancy embryo is still unstable, sex to stimulate the uterus contraction easily caused by abdominal pain or vaginal bleeding, abortion and other accidents. The second three months of pregnancy, the uterus increased significantly, sexual stimulation of uterine contractions can easily lead to preterm delivery, and then easy to increase the chances of infection gynecological inflammation. Generally in the middle of pregnancy 4-6 months can be appropriate sex, as long as the pregnant woman does not have a history of preeclampsia, there is no abdominal pain and vaginal bleeding and other abnormalities can be reasonable coitus, but we should pay attention to avoid too frequent sex, coitus can not be compressed abdomen, such as coitus in the process of uncomfortable symptoms need to be stopped in a timely manner.