###Human: Will taking I-pill cause delay in periods? ###Assistant: Hello. With I-pill, sometimes periods gets irregular for 2 to 3 cycles. If there is any history of sexual intercourse after last month periods, then you can do blood test serum hCG. If it is negative then no chance of pregnancy at all. You can simply wait for 1 to 2 weeks for periods. Even after 1 to 2 weeks you do not get periods, then medicine can be given for withdrawal bleeding. But if bhCG is positive then pregnancy is there. And treatment will be accordingly.