MY Girlfriend has been having some problems with her menstrual cycle. Since the last time she had her period in December, she hasnt had another one to this day. We are sexually active, with and without protection, but more with.
She has taken close to 4 pregnancy tests, all coming back negative. All the time she has had the cramps indicating that she will start soon, but she never does. She does not show any signs of pregnancy, and after 4 tests coming back not pregnant, its pretty obvious that she isnt.
I've read that the menstrual cycle is driven by horomones. Could it be that her body isnt giving enough? Also, will problems like this cause her to become sterile and not able to have children in her later life?
Please help. Thank you.