Yesterday morning my GF should start to take a new pack of contraception pills (after 1 week of not taking them because of period). She forgot to take it and we realised that after sex, so that's when she took it (12 hours too late). Now were afraid that there are chances she could get pregnant. It's the first time that sometimes like this happened, she never forgot to take one of them before... So, is the pill still affective, if it's taken 12 hours too late? Is there any difference if you forget to take the 1st pill of new pack or any pill during the 3 week period of taking them?