I had an issue with a *really* broken condom right smack in the middle of my cycle. I took the first plan B pill 54 hours later. I know it's supposed to be effective up to 72 hours, but sperm can fertilize an egg anywhere from 10-72 hours but usually within 24 hrs. The info I read from Plan B and Princeton statistics says if fertilization has occurred, it may prevent implantation but the primary function is to delay ovulation. Uh, any similar situations? Anyone know about the chances of morning after pills when sex occurred during ovulation?

Thats precisely what that was designed for, its not 100% but its better than nothing.

Yes as hypno said something is better than nothing.It is not 100% effective but there are not many cases of it failing