Science J. Next Story. To view a copy of this license, visit http: Potential for homosexual response is prevalent and genetic. Although there is some evidence that women with lesbian tendencies on average show possible prenatal exposure to higher androgen levels than groups of non-lesbian women, more than 50 years of studies have failed to demonstrate that biological factors, genes or hormones, decisively influence the development of female sexual orientation , nor have they demonstrated differences in male hormone levels in the prenatal stage between homo- and heterosexual men . Newsletter Sign Up Continue reading the main story Please verify you're not a robot by clicking the box. This site uses Akismet to reduce spam.
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The American Psychiatric Association and the World Health Organisation suggest that the desire to change sex is a disorder or alteration of personality, not of genetics or human physiology. Author information Article notes Copyright and License information Disclaimer. In cases where children of three years of age or older reject their own sex, it is important to reach a definitive and reliable medical, paediatric and psychological diagnosis, as a basis to establish an appropriate treatment plan. Thus, maternal stress during pregnancy has been related with an imbalance in the cortisol level with an effect on gonadal development, the nervous system and subsequent sex-typed behaviour in early childhood .
The expression of thyrotropin receptor in the brain.