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I dont think there is a correlation between genetic abnormalities and gender identity. At least nothing that I have heard.
But we do happen to know that in many ways a MTF transsexuals brain is female and a FTM transsexuals brain is male. I have studies/articles on that if you are interested.
"The mostly likely explanation: The Zhou/Kruijver findings reflect the effects of feminizing and masculinizing hormone therapy," not natural born DNA or biology.
Unless this has changed in the last 5 years (and I would be interested in seeing it) Your statement would be incorrect.
The brain-sex theory of transsexualism has never been easy to reconcile with clinical reality: Homosexual and nonhomosexual MtF transsexualism are so different clinically that it is almost impossible to imagine that they could have the same etiology. Nevertheless, for a time the Zhou/Kruijver data gave the brain-sex theory a certain superficial plausibility. In 2002, Chung et al. reported new data that raised serious doubts about the brain-sex theory, but the authors were able to explain why the theory might still be plausible. The new data reported by Hulshoff Pol et al. in 2006 did not invalidate these explanations, but it rendered them largely irrelevant. The simplest and most plausible explanation of the Zhou/Kruijver findings is that they are attributable, completely or predominantly, to the effects of cross-sex hormone therapy administered during adulthood. There is no longer any reason to postulate anything more complicated. - A Critique of the Brain-Sex Theory of Transsexualism
PS the author is still practicing: http://www.annelawrence.com/practice.html
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