After a man’s semen is ejaculated into a woman’s vagina, eating food or medication is not able to kill sperm, but a woman can take short-acting contraceptive medication to interfere with ovulation, such as suppressing ovulation, which prevents the union of sperm and egg and can play a role in contraception, but no other medication can kill the sperm in a woman’s body. The sperm can enter the woman’s body and survive for 2-3 days so that there may be a chance of conception. If you do not wait for the egg to unite, the sperm in the woman’s body will slowly wither away, lose its activity and have no role in fertilization. If a woman wants to avoid pregnancy, she can use contraceptives such as birth control pills to prevent ovulation and prevent the sperm from combining with the egg, thus avoiding pregnancy.