Condoms: How to Use, Effectiveness | 合法醫療器材資訊網

A condom is a thin, fitted tube worn over the penis during sex (male condoms) or inserted into the vagina before sex (female condoms). They create a barrier that keeps semen and other body fluids out of the vagina, rectum, or mouth.

You might hear a condom called a rubber or the barrier method. But, no matter what you call them, condoms have the same purpose. They prevent STDs[1] (sexually transmitted diseases) and pregnancy. And they’re a good birth control option because theyre cheap, easy to get, and you dont have to plan ahead to use them.

How well a condom works depends a lot on whether you use it the right way.

When used properly, male condoms are about 98% effective at preventing pregnancy. This means that in one year, 2 out of every 100 women whose partners always use condoms correctly will get pregnant. That number...