This question interests me, too. I know I started at 10, and my 2 daughters started at 9 and 10.
Thanks for thinking of this question, it's given me some relieve to see that it's not that uncommon to start at 9 or 10. But once again it poses the question; does this increase a girls risk for BC?
I started in 7th grade so probably 12 or 13. Remember it, because my mom had never talked to me about it and I was scared. Vowed if I ever had a daughter I would make sure she knew before, but didn't have to experience that - no daughters.
Kitty