Gender identity
F64.2 Gender identity disorder of childhood: A disorder, usually first manifest during early childhood (and always well before puberty), characterized by a "persistent and intense distress about assigned sex", together with "a desire to be (or insistence that one is) of the other sex". There is a "persistent preoccupation with the dress and activities of the opposite sex" and "repudiation of the individual's own sex". The diagnosis requires a profound disturbance of the normal gender identity; mere tomboyishness in girls or girlish behavior in boys is not sufficient. Gender identity disorders in individuals who have reached or are entering puberty should not be classified here but in F66.0.