Sexual orientation of homosexuality and heterosexuality is influenced by genes, however there is no definitive explanation for transsexualism. Research of perinatal modified hormone exposure has been conducted on a variety of animals, the animals’ generally demonstrated sexual behavior not associated with their physiological gender. According to Pinel “the
Sexual orientation of homosexuality and heterosexuality is influenced by genes, however there is no definitive explanation for transsexualism. Research of perinatal modified hormone exposure has been conducted on a variety of animals, the animals’ generally demonstrated sexual behavior not associated with their physiological gender. According to Pinel “the