A spermicide is a chemical product used for birth control. It contains chemicals that kill sperm. It comes in a number of forms, such as foams, jellies, and creams. A spermicide is inserted into a woman's vagina before sexual intercourse. It destroys the sperm in a man's semen before the sperm reach the uterus.
Spermicides are somewhat unreliable when used alone to prevent pregnancy.
They work better when they are used with another barrier form of birth control, such as a diaphragm, cervical cap, or condom. Put the spermicide into the vagina less than 30 minutes before sexual intercourse. Use the applicator provided with the spermicide to insert the spermicide high in the vagina over the cervix. The spermicide should cover the cervix. Insert more spermicide each time you have intercourse.