Stomach pains after we have sex

After my girfriend and I have sex, she complains about stomach pains. Can you tell me why?

shes pregnant

its because she worked out her abs having sex... its fairly common when your new at it.

it does not mean she is pregnant, dont believe that bull. I know someone who has had the same problem... just like the above advice.. its like a workout for her cervics as well as her stomach.. so it can tend to hurt... untill those muscles have tightened. Just like if she was working out in a gym she would hurt if the exercises arnt regular.

maybe you are just to big for her or maybe she has something wrong inside if it it only happened since she has been with you then I think it's the first thing I said if it has hurt her before you with other partners then maybe she has an internal problem