When used correctly and consistently, condoms remain one of the most effective tools for the prevention of pregnancy and sexually transmitted infections (STIs). This includes external (male ...

Narrator: But the complex male anatomy isn't the only problem ... More from Science Narrator: Did you know the condom is over 5,000 years old? That's right, some of the first forms of birth ...

Female condoms also protect against STIs if used correctly. Female condoms aren't quite as effective as male ones. In a year of typical use, about 21 out of 100 women will get pregnant.