"hi. this did not work for me. i was fertile but not ovulating as i thought so. my partner had done his business inside. so the next morning i took plan b within 18 hours. i waited for my period, thought i was stressed and delayed my period. then after 6 weeks i got a pregnancy test and it was positive. i am 40 years old and this was my first pregnancy. however i chose to not go through with it. please don&#039;t rely on this. anything can happen even at my age. please use proper birth control methods. "