Norforms: How Spermicides Work & Effectiveness

Norforms are a type of spermicide, which are products inserted into the vagina to kill sperm. They are over-the-counter forms that are meant to prevent pregnancy. Norforms are typically used in conjunction with a barrier method, like a condom, and are not as effective as other methods of birth control, such as hormonal birth control pills. The effectiveness of spermicides is about 72%.