Is I-pill Effective When Taken After Multiple Intercourse Sessions?

Hi doc I would like to know that if have intercourse lets say for 10 times in couple of days but u still manage to take ipill before 72hours..will it be able to wipe out the effect for all the 10times.....i mean does ipill effect stays if u have unlimited sex and still u are able to takean ipill iin-between 72 hours... Thanks