Have you looked?Ok, good point but I've yet to see it scientifically proven as a cause for transsexualism.
Anyway, seeing a different brain structure in men and women and corresponding body/brain disparities in transgenders might not be prof, but it looks like a good indicator. And something worth continuing studying.
Perhaps because changes in brain structure in adults is so far out that nobody bothered with looking for it?Well I'm not claiming they did, I'm claiming they might, something these studies didn't seem to address.