One of life's tragedies is to be born a woman in a man's body. Now researchers have found a genetic cause for this.
DNA analysis of over 100 transsexuals showed that all of them had a longer version of the male androgen receptor gene, meaning that this essential male hormone may not be have reached their brains efficiently while they were in the womb.
BBC News quotes researcher Lauren Hare as saying, "We think that these genetic differences might reduce testosterone action and under masculinize the brain during fetal development."
BBC quotes researcher Vincent Harley as saying, "There is a social stigma that transsexualism is simply a lifestyle choice, however our findings support a biological basis of how gender identity develops."
This study was done on men who feel they are really woman, which is much more common than the opposite condition, probably because men have an X chromosome as well as a male "Y" (men are XY while women are XX).
Art credit: freeimages.co.uk
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