Sex Education!Versión en línea This is to aid in learning about sexual health and methods of contraception. por Kathryn West 1 Condom 2 Birth control A latex or polyurethane sheath rolled over a male’s penis to prevent semen and pre-cum from entering another person’s body. A collection of methods that are used to prevent pregnancy. Also known as contraception. A small plastic or rubber cup that covers the cervix to prevent sperm from entering the uterus. Also known as a barrier method of birth control, it must be used with spermicide for maximum effectiveness. It is 80-91-percent effective at preventing pregnancy and is prescribed by a health care provider and dispensed by a pharmacist. It does not prevent sexually transmitted diseases (STDs). A way to reduce the risk of pregnancy after unprotected vaginal intercourse or intercourse where the method of birth control failed.