Originally Posted by Saka
I've read that if the egg has been fertilised, taking a BCP after the fact will not help. The only way to stop it would be to take the emergency contraception (morning after pill).
This is NOT correct. Emergency contraception is no more effective in terminating a pregnancy than regular birth control pills. Both of them work the same way, and that is by preventing pregnancy. The only difference is that with BCP, the dose is low and constant, with ECP the dose is high and in only two doses, to get it into your system quickly.