it depends on what pill you are on they vary from 92 - 97 % effective, but if you forget to take it one say and have sex for like 3 days or so after it could effect it - stop working for a bit, u should go on the pill and use condoms, condoms protect against STD's and the pill against babys. if you really need help like the morning after pill etc. go and see you doctor or local GUM clinic and they will help ya out a bit xxx
it's on average 95% effective. to have it work 99%, you need to take it at the exact same time everyday, you need to be on it for a certain amount of time (it varies between some brands) and if you skip a day it becomes much less effective.
I can neither vouch for nor debunk the effectiveness of The Pill, but you're a fool if you don't use a condom. -- Skeeter
yeah theres the day after pill as someone mentioned and theres depo but i wouldn't use depo if i where you