I have a character in a series of stories who is a male-to-female transgendered girl. She has known her true gender pretty much since she was a toddler, and has parents who are really cool about it. She's on hormones and so on. Now, my question is, how young can one get sex reassignment surgery, with parental consent? I ask because I want her to have already had the surgery and been recovered from it by the time of the story I want to write next, and would prefer her to be 16 or 17 if that's possible.
I tried finding out on Google, but I failed. Tried "sexual reassignment surgery," "sexual reassignment surgery and youth," and "transgender youth" and get information overload. I haven't been able to locate the answer to the specific question.
Thanks in advance!
Edit: Can't really help on the setting. It takes place in an unspecified near future in an unspecified (and probably fictional) city. And I think it was taking place in Iowa, but I am not sure, and I might change it to Oregon.