I pill,unwanted 72,option72 ..are emergency  contraceptive medicine and designed  only  for emergency  purposes...don't  take above  medication as routine backup method for contraception... frequent use of emergency  contraceptive medicine menstrual  can cause heavy  bleeding  ,abdominal cramp, menstrual  irregularities.use barriers  like  condom  during  sexual  intercourse  to avoid  pregnancy  as well as  sexual transmitted diseases.

I pill and all other emergency contraception pill act in a different manner depending on which day they have been taken in relation to your menstrual cycle... Emergency contraception pill have high failure rate so they are not advisable to be used on a regular basis

Within 7 to 10 days

Within 21 days after the pill

Period may or may not come at usual time.. I pill does not induce periods.. I pill should only be used as emergency contraception and not as routine one otherwise it will cause hormonal imbalance leading to irregular cycles.. I pilk will not affect future pregnancy as such..