Foam is inserted with an applicator into the vagina before intercourse. Like condoms, foam can be purchased at any drugstore. Failure tends to result from incorrect and inconsistent use. Foam may help provide protection against STDs. Occasionally, a woman or her partner may have an allergic reaction to the foam.
Some women dislike applying foam, and some complain of messiness and leakage.
The effectiveness of condoms and foam is very good when they are used together. The foam acts as an extra security. In case the condom breaks, foam will kill the sperm. Permission is granted to reproduce for educational non-commercial uses if this message is shown.