The contraceptive sponge is a type of birth control (contraceptive) that prevents sperm from entering the uterus. It is soft and disk-shaped, and made of polyurethane foam. The contraceptive sponge contains spermicide, which blocks or kills sperm.
Before having sex, you insert the sponge deep inside the vagina so that it covers the cervix. Your vaginal muscles hold it in place. The contraceptive sponge has a strap on one side for easier removal.
Only one contraceptive sponge — Today Sponge — has Food and Drug Administration (FDA) approval in the U.S.
The contraceptive sponge can prevent pregnancy but doesn't protect against sexually transmitted infections (STIs).