If you experience pain in your stomach during intercourse after pregnancy, it is possible that the pain is caused by the contraction of the uterus due to the stimulation of the uterus during intercourse. It is generally recommended not to have intercourse during the first three months of pregnancy because the fetus is not fully developed at this time and it is an important time to preserve the fetus. If the uterus is stimulated at this time, it is likely to lead to miscarriage if it is too strong. If the fetus is stable in the middle of pregnancy, you can have intercourse, but you need to be careful not to have too much movement during intercourse to avoid stimulating the uterus. In the second trimester of pregnancy, you should also try to reduce the number of intercourse to avoid premature birth after intercourse. In general, you should pay attention to hygiene after pregnancy, and you need to pay attention to cleaning when you have intercourse, so as to avoid inflammation and infection.