the very best information I have seen out is relating to a university that decided not to do transgender surgery as it was not helpful,
the original article you need to sign up to read, but it's free I think.
http://www.wsj.com/articles/paul-mchugh-transgender-surgery-isnt-the-solution-1402615120
you can see some of the details here:
http://www.cnsnews.com/news/article...atrist-transgender-mental-disorder-sex-change
you will see all sorts of gay extremists calling it fraudulent, but that is mainly due to the fact that they have no peer review for their work.
the author has numerous peer review to back up his claims.
the only real fraud is transvestitism.
if you look for peer review for homosexuality as pathology you will see as well numerous works.
it's a mental illness, homosexuality.
probably linked to depression, and stress.
even most links to a homo gene, has been disolved in many studies.
the american psychological association has this to say:
“There is no consensus among scientists
about the exact reasons that an individual
develops a heterosexual, bisexual, gay, or
lesbian orientation. Although much research
has examined the possible genetic, hormonal,
developmental, social, and cultural influences
on sexual orientation, no findings have
emerged that permit scientists to conclude
that sexual orientation is determined by any
particular factor or factors...”
http://www.apa.org/topics/lgbt/orientation.pdf
so basically they are saying there is no Gay gene that they can use as evidence.
and now john hopkins researchers are also saying transgender sugery is not helpful