If you don't want to get pregnant – or don't want your partner to get pregnant – you need to use birth control, also called contraception or family planning. There are lots different types of birth control methods. Another way to avoid getting pregnant is abstinence.
There are two ways to rate how well birth control methods work. You can say how good they are if people use them perfectly. Or you can look at what happens in real life – because people aren’t usually perfect!