I identify as female, but biologically I'm Intersex. Atypically so, I looked normally male at birth, didn't develop, and changed to look female with ambiguous genitalia later. Usually such rare changes go the other way when they happen, looking female at birth and looking ambiguous or male later.
Mostly though, the ambuguity is present at birth, and doesn't change. I'm atypical, even for someone IS.
Many of us identify as either male or female. Some identify as neither, others as something of both. And have the bodies to justify that, for those religious fanatics that insist on justification. They - we - are as God made us. Deal with it. Take it up with Him if you have a problem.
Now on to the documentary, in 5 parts: Intersexion.