Where does the sperm go during pregnancy?

The sperm enters the body through the vagina, then travels through the cervix and womb to the fallopian tubes, where the egg is usually fertilised (conception). The egg can be fertilised by sperm contained in semen or pre-ejaculate

Vaginal sex is considered safe during pregnancy unless suggested otherwise by your gynecologist. A doubt may arise as to what happens to the semen or sperm during pregnancy. You may also have concerns regarding its effect on the growing fetus. Unprotected sex and semen have no adverse effects in non-complicated pregnancies.
Your baby is floating inside an amniotic sac protected by the amniotic fluid, and the cervix is covered with a mucus plug. Semen with sperms deposited in the vagina will be denied entry by the mucus plug and eventually come out of the body via the vaginal opening. The mucus plug is intended to keep bacteria or other potential sources of infection away from the uterus, and the same applies to semen.