Generally, sexual life is prohibited in the early and late pregnancy, and sexual life can be properly carried out in the middle of pregnancy. Due to unstable embryo implantation in the early pregnancy, it is easy to lead to threatened abortion or even miscarriage when having a roommate; In the late pregnancy, due to the enlargement of the fetus and uterus, it is easy to lead to threatened preterm birth, premature delivery, premature rupture of membranes, intrauterine infection, and even the risk of placental abruption in serious cases. In the middle of pregnancy, that is, 4-6 months of pregnancy, the fetal image is relatively stable at this time, and sexual life can be carried out properly. However, attention should be paid to controlling the frequency and intensity of roommates. Once there is vaginal bleeding, abdominal pain and other discomfort after roommates, it is recommended to go to the hospital in time for treatment to ensure pregnancy. After 3 months of pregnancy, the bleeding in the same room, considering the possibility of threatened abortion, it is recommended to go to the hospital to see a doctor, at the same time, understand whether there is bleeding caused by cervical polyps, cervical erosion and other pathological changes, and if necessary, provide fetal protection treatment.