Semen leakage does not usually affect pregnancy After intercourse, as long as a small number of sperm enter the uterus and combine with the egg, pregnancy is possible. Semen flow after intercourse is a normal physiological phenomenon. Since the vagina is a barrel-shaped channel and there is no sphincter at the outer opening, semen may flow out of the body as the body position changes. Although part of the semen out of the woman’s body, but because the sperm have forward movement, so part of the sperm will be through the cervical canal into the uterine cavity, in the fallopian tube potbelly waiting to combine with the egg. Sperm survival period is usually 3-4 days, during this period as long as the female ovulation, usually through the fallopian tube into the pot-belly and sperm combination, thus forming a fertilized egg. If the male sperm is more vigorous and has better forward motion motility, the chances of pregnancy will be higher, on the contrary, it may affect the pregnancy.