Condoms are a barrier method of contraception - they stop the sperm reaching the woman's ovum. Condoms are made of very thin latex. They should be unrolled over the man's penis before making love. The man's sperm is trapped inside the condom and so they have no chance of getting inside the woman. Condoms are reliable if used properly. They also protect against AIDS. They should be used with a spermicidal cream that kills sperm.
