fertility and heredity

Dr.Q, I am going to try to get all my questionsin so I don't keep bothering you. My mother is adopted so I don't know anything about my maternal background. The only thing I know is my mother had no trouble conceiving my brother or me,andher biological mother seemed to have no trouble either since my mother was #5. I have always had very regular periods with no symptoms of endometrosis or pcos. Doesn't seem to be any fertility problems on dad's side either. No type 2 diabetes. I have been pretty much like my mother so far, sterting periods at the same time, age 11. What are my chances of having endometrosis or pcos since no one that I know of has had them? I began taking birth control pills at 22 when I got married. Just came off them. I just turned 27. Thanks for your patience.