The vaginal sponge was introduced in 1983 and is continuing to make a comeback. It's a soft polyurethane device that already contains a spermicide. It has a one time use and is placed over the cervix. It offers continuous spermicide release for 24 hours, and is removed by pulling on a small loop extension. You must leave in place for 6 hours post sex, and if left in for more than 24 hours, it has the same risk as the cervical cap. Failure rate is 14-28%.
Next up: Just give me a pill.
