How effective is emergency contraception? The effectiveness of emergency Contraception (EC) depends on which kind of EC you use and how quickly you take it after unprotected sexual intercourse. Studies indicate that emergency contraceptive pills are 75% effective in preventing pregnancies if taken within the first 72 hours of unprotected intercourse. Emergency Contraception pills are most effective when used as soon as possible after having unprotected sex.
The term “morning after pill” can be somewhat misleading as the pill should be ideally taken immediately after the intercourse instead of waiting for the next morning. 
