I-pill contains excess hormone that disrupts the normal hormonal
equilibrium of the body and thus, results in breakthrough bleeding
most of the time. It also disturbs the normal menstrual pattern and period is mostly delayed. The efficiency of the pill is about 85% on an average and the earlier it is taken after the act, the more efficient it is. Your normal menstrual cycles usually get back after this one. If you do not get a period within 10-14 days after the expected date, you should visit your consultant for an evaluation. Take care.