"i took the pill within the 72 hour period  (i am a plus size woman, i don&#039;t see many reviews about psws and allegedly there&#039;s some weight limit to the pill), got my period about a week or two later and i haven&#039;t had my period for this month. the period i did have lasted about two or three days longer (about 8 days.) so i&#039;m sure the pill works to a certain extent, i guess my period still needs to regulate. it&#039;s costly but effective."