Stockholm - Most transsexuals live happier lives after a sex-change operation because the condition has biological rather than psychological causes, according to Swedish psychiatrist Mikael Landen.
In research published in Sunday's Dagens Nyheter newspaper, Landen said he has discovered three genes present in transsexual males that make them less sensitive to testosterone, the male hormone which stimulates the development of the male sexual organs.
"That reinforces the theory that transsexuality has biological, rather than a psychological, causes," Landen said.
"It could explain why transsexuals cannot be cured by therapies, and why there are transsexuals in every civilisation," Landen added.
In a study of 400 transsexuals, Landen found that nine out of ten were happier after the operation. They had better psychiatric health and better working relations. They were also less likely to commit suicide.
And after the sex-change most transsexuals went on to have a sexual life they had never imagined possible before they were operated on.
Women who become men tend to do better psychologically, he said, even if their false penises do not function fully.
Men who become women on the other hand are able to obtain orgasm. - Sapa-AFP
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