Emergency contraceptives are pills that release hormones to keep an egg from implanting into the uterus. They are available over the counter. They should be used within 24 hours of unprotected sex or if an emergency occurs, such as a broken condom. They may be effective up to 5 days after intercourse. Types of emergency contraception include the ParaGard IUD and the “morning-after pill.” You should never rely on emergency contraceptives as a primary form of birth control.