The first pregnancy is not allowed to have intercourse, the placental villi are immature before 8 weeks of pregnancy, the connection with the uterine meconium is not yet secure, the embryonic villi are easily separated from the bottom meconium, collision and contraction of the uterus during intercourse may cause the embryonic tissue to fall off and lead to miscarriage. After the third month of pregnancy, the placenta has formed and the connection with the meconium is relatively stable, so you can have intercourse properly, but be careful not to be too violent, so as not to cause miscarriage. In early pregnancy, you should also pay attention to rest, avoid strain and strenuous exercise, try to do less bending, squatting and other movements, light diet, balanced diet and nutrition. If abdominal pain and vaginal bleeding occur in early pregnancy, it is recommended to go to the hospital in time for fetal preservation treatment.