In the first report of its kind, the authors detail their joint study of a twenty-three-year-old male with an eleven-year history of alternating three-to-four-day cycles of male and female behavior and feelings. Increasing homosexual impulses forced him to seek aid, and the initial diagnosis revealed a highly intellectualizing paranoid schizophrenic, with marked scoptophilic conflicts and body image confusion. As a child he had been the object of his father's sadistic behavior, with four to five daily enemas in the first years of life.

By age four he was overtly effeminate and remained so in body and behavior except for intervening cycles of masculine feelings after puberty. Although he had shown signs of somatic masculinization during the previous year, steroid assays at the start of therapy showed abnormally low androgen and FSH levels of presumed pituitary origin. Eight months later, re-assay showed a rise in both to normal levels.

After six interviews the cyclic behavior abated and was thought to have