Jul 20, 2017 · 1 min read
Except there are XY women and XX men, and also people who have a mixture of male and female characteristics, that don’t fall cleanly into a male or female category. This is because our sex isn’t determined by X and Y chromosomes, but instead depends on what hormones were present during the time our prenatal development was taking place.
https://www.quora.com/What-causes-a-person-to-be-transgender/answer/Hugh-Easton-1