Cross-gender behavior carries a greater social stigma for boys than girls; girls with gender identity disorder experience less overall social rejection, at least until adolescence. (psychology.jrank.org)
Gender identity disorder generally begin to manifest between the ages of two and four, in which a child displays a preference for the clothing and typical activities of... (psychology.jrank.org)
Formerly called gender identity disorder, gender dysphoria is substantial distress associated with nonconformity to one's assigned sex. (sciencedaily.com)