Biological causes of transgender and transsexuality Gender identity

some studies have investigated whether or not there link between biological variables , transgender or transsexual identity. several studies have shown sexually dimorphic brain structures in transsexuals shifted away associated birth sex , towards associated preferred sex. in particular, bed nucleus of stria terminalis or bstc (a constituent of basal ganglia of brain affected prenatal androgens) of trans women similar cisgender women s , unlike men s. similar brain structure differences have been noted between gay , heterosexual men, , between lesbian , heterosexual women. study suggests transsexuality may have genetic component.

research suggests same hormones promote differentiation of sex organs in utero elicit puberty , influence development of gender identity. different amounts of these male or female sex hormones within person can result in behavior , external genitalia not match norm of sex assigned @ birth, , in person acting , looking identified gender.