I am assuming I have taken many of the same courses that you have, because I do not post disinformation about genetics and biology.    My general familiarity of the subject comes from when I was studying neuropsychology in my doctoral program, as that was my original choice of specialization (I later changed it to Forensics).  That is how I learned that in the earliest weeks of development, we are all endowed with both male and female hormonal characteristics that later change to a variety of biochemical outcomes - and it seems rather clear that the variation includes situations of dystonic sexual identity with opposing physical features.  Didn't you learn the same?