Emergency contraception (ECP) or emergency birth control, is used to help keep a woman from getting pregnant after she has had sex without using birth control or if the birth control method failed. If you are already pregnant, emergency contraception will not work. Emergency contraception should not be used as regular birth control. Other birth control methods are much better at keeping women from becoming pregnant. You should always take ECPs as soon as you can after having unprotected sex. Our Public Health staff is able to assist you with emergency contraceptives.