Effectiveness
The contraceptive sponge is 83% effective with typical use. This means that out of 100 women using the sponge, 17 women will become pregnant. This method may be less effective against pregnancy for women who have already had a baby.
How It Works
After it is inserted, the sponge prevents pregnancy by releasing a spermicide that kills or paralyzes sperm that come into the vagina. A “dimple” on one side of the sponge fits over the cervix, preventing sperm from reaching an egg. The “dimple” lowers the chances that the sponge will move out of place. The other side of the sponge has a loop for easy removal, but sometimes when removing it, the sponge may break into several pieces. It is important to remove all the pieces from your vagina. If you have any concerns that the sponge is not in one piece, contact your health care provider.
Side Effects
Allergy is uncommon, but some women may react to the spermicide that is in the sponge. Stop using the sponge if you experience any localized burning, itching, redness, rash or irritation. If you or your partner are allergic to sulfa drugs, make sure to talk to your health care provider before you begin using the contraceptive sponge.