After a four-year lapse, that little, round, pink piece of foam that gained national attention ... over-the-counter form of birth control, the sponge was used by 6.4 million women between 1983 ...

However, it’s more commonly used with another form of birth control to make it more effective, such as a sponge or cervical cap. A contraceptive sponge is made of foam with spermicide on it and ...