###Human: Why have I not got withdrawal bleeding after taking Unwanted 72? ###Assistant: Hi. As you have taken Unwanted 72 within seven hours there are no chances of pregnancy. This pill does not always result in withdrawal bleeding but can as well delay the periods depending upon which phase the pill has been taken that is the first phase (estrogenic phase) of the menstrual cycle or second progesterone phase. Wait till your period date or even later as they may get delayed for about two weeks and maximum. There is no need to do a urine pregnancy test in between if they get delayed by two weeks. Later you can do if no periods after that.