Semen flowing out after intercourse can also lead to pregnancy because a small amount of sperm can cause pregnancy. In one sexual intercourse, semen can reach 3-5ml, of which the number of sperm is very large, so the semen flowing out is only a part of it. Moreover, before the semen flows out, the more vigorous sperm have already passed through the cervix to reach the uterine cavity, so this semen that flows out has no effect on pregnancy. If you want to have a baby, you can put a pillow under the woman’s buttocks to increase the time of semen in the vagina, which may increase the pregnancy rate, but it is usually not a big problem.