Hormone Hypothesis , as previously mentioned , the theory is that exposure to androgens in the womb affects the subsequent development of the brain . Indeed , they found certain structural differences between the brain of homosexuals and heterosexuals . The fist breakthrough study was by Swaab and Hoffman (1990 as cited in Alexander , 2000 . They focused on the suprachiasmatic nucleus (SCN ) of the hypothalamus . It was already established that this region is sexually dimorphic and significantly larger in men compared to women . They , however...











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