A very common side effect of taking i-pill is a significant alteration in periods ?they can either be early or be delayed. Most women will experience withdrawal bleeding at the scheduled or expected dates,
while some may get menses within 5 days. If you get periods earlier then expected date or on date, you can be assured that pregnancy has not taken place, but in case of delay in periods, it is best to take a pregnancy test one week over the expected date. This is largely a rare occurrence.