TiredConlanger
kiwifarms.net
Yeah, there have been examples of that, and now that we have better imaging equipment there's been examinations of live brains, which do show that FTMs have brains more similar to males, and MTFs have brains more similar to females, there's not a great deal of research on this yet, but what has been done is all showing similar things.
There's also the David Reimer case, which was the first real proof we had of brain sex. Thankfully that experiment's never been repeated though.
The irony of the Reimer case was that John Money was trying to get the exact opposite results (that someone raised as female would then be female and that brain sex was entirely socialized). Money also claimed his hypothesis was proven with Reimer and wrote something claiming that, in spite of the evidence to the contrary.
Getting back to the more goofy parts of this sort of retarded shit, I come bearing Tumblrtard screencaps.
Edit: Formatting.