Bleeding during intercourse during pregnancy can have an effect on the fetus. Especially in the early stages of pregnancy, if bleeding occurs during coitus, the chances of miscarriage are higher, so coitus is not recommended in the early stages of pregnancy. This is because the fetus and the placenta are not fully developed at this time, and the chances of miscarriage caused by intercourse at this time are higher. It is also not recommended to cohabitate in the late stages of pregnancy when the fetus is bigger, the belly of the pregnant woman is more serious and the pregnant woman is more bulky, which will easily lead to an increase in the chances of preterm labor. If bleeding occurs, there may be premature labor. At this time, you should try to pay attention to bed rest, do not strenuous exercise, and then observe the size of the bleeding. If there is heavy bleeding in early pregnancy, you should use birth control drugs in time to avoid miscarriage.