The birth control sponge, also known as the contraceptive sponge, is a small, round sponge made from soft, squishy plastic that is placed deep inside the vagina before sex. The sponge covers the cervix and contains spermicide to help prevent pregnancy. The Today Sponge is the only brand of sponge sold in the U.S. . The sponge prevents pregnancy in three ways: it fits snugly against the cervix, blocking the entrance to the uterus so sperm can’t get to the egg; it contains spermicide, which slows sperm down so it can’t reach the egg; and it traps and absorbs sperm. The sponge can be used by itself or with condoms, and using the sponge plus a condom gives extra protection from pregnancy. The sponge can be inserted up to 24 hours before sex, so it can be put in place before the action starts. The sponge is easy to insert and is similar to putting in a tampon. The sponge is about 88% effective for women who have never given birth and about 80% effective for those who have given birth. The sponge is a hormone-free option and is a good choice for people who cannot use hormonal birth control. However, the sponge does not protect against sexually transmitted infections.