He informed me he was pretty scared because, he was having sex and accidentally finished inside of her. The good news is shes on BC, and was on day 4 of her cycle. He looked up her birth controls site, and it said that days 13-17 was when she is most fertile. So i got on here and read for him, and i see that sperm can only live about 6 days inside of a woman. So after hearing this he didn't feel quite as bad...but i was just wondering, what do you think the chances of pregnancy are?