Worried about girlfriend being pregnant

VERY VERY VERY SLIM CHANCE. IF SHES ON BC AND YOU DIDNT CUM INSIDE HER VAGINA THEN NO SHES NOT. BC IS 99% EFFECTIVE IF TAKEN CORRECTLY. ALSO SPERM DIES ONCE AIR HITS IT. SO YOU SHOULD HAVE NOTHING TO WORRY ABOUT.

thats not entirely true.. birth control is 86% effective.. or 86-96 % effective im on it and a couple Doctors have told me this... its better to use a condom and be on bc.. besides.. most girls get pregnant while on bc then having used a condom

The chance is very slim. It sounds like your question and worry has arisen out of a a feeling of guilt. As there is always a chance, be it a very small one, you will have to talk this through with your girlfriend. Life is precious. But here is the flip side... hundreds of millions of sperm come out in one ejaculation, if this happens in the vagina then most of them trickle out of the vagina. Maybe a few hundred manage to make their way through the cervix opening and usually only helped by the fertile mucous (clear and full) that is found around day 10-14 of the cycle. Of these few hundred they have to swim what would be equivalent to us swimming 17 lengths of an olypic size swimming pool to meet an egg in the falopian tube. half will go to the wrong tube and the other half will be on the right track. But only when they meet an alive egg (12-24hours after ovulation) and then it has to get throught the thick layers of the egg to get to the nucleous (centre). Falling pregnant for many people is very difficult, and for others it happens without them realising the time was 'just right'. If you love your girlfriend then you'll stand by her no matter what. My advice for you is... don't do something you're not willing to take responsibility for if the consequence is not simply physical satisfaction! :$