What is a condom?
Condoms act as a mechanical barrier; they prevent pregnancy and reproductive tract infections by stopping sperm from going into the vagina. They should be placed on the penis before it enters a partner's vagina. Condoms are made of latex (often called "rubbers"), polyurethane (plastic), or natural membranes (often called "skins" and made from the intestine of sheep). Polyurethane condoms may be used by couples when either partner is allergic to latex. Condoms are one of the only methods of contraception that are also effective for use with oral sex, sex toys and anal sex. Condoms resemble a long thin deflated balloon. Male condoms are considered to be between 85-98% effective. Among typical couples, about 15% will experience an accidental pregnancy in the first year. If condoms are used consistently and correctly, about 2% will become pregnant over the course of an entire year.