The morning-after pill, or emergency contraceptive pill, helps you prevent an unwanted pregnancy even after you have had unprotected sexual intercourse. These pills are most commonly known as the morning-after pill but this term is misleading, because these pills work for up to 120 hours after you have had unprotected sexual intercourse or in case of failure of traditional methods of contraception. Sometimes, in spite of planning in advance, couples forget to use contraception and get caught up in the heat of the moment. This can give rise to various complications out of which pregnancy is just one. Emergency contraception comes in handy during such times.