You can take emergency contraception to prevent pregnancy after unprotected sex, or if something has gone wrong with your usual contraception method (for example a condom broke or you forgot to take your contraceptive pill).
You should not use emergency contraception regularly – there are much better types of contraception that are designed for regular use.
The most common type is an emergency contraceptive pill.
You can also use a copper IUD as emergency contraception. This is a t-shaped coil that goes into the womb.