title: Effects of estrogens, clomiphene and castration in a male transsexual with as compared to those without hypersecretion of gonadotropins.
abstract: A 24-year-old male-to-female transsexual with hypersecretion of gonadotropins was studied with regard to his recovery from sex steroid hormone treatment before his sex change operation and the effects of castration, clomiphene tests and estrogens on the hypersecretion of gonadotropins. Computer-assisted tomography and X-ray results indicated that the possibility that the hypersecretion of gonadotropins was not associated with a pituitary adenoma could not be ruled out. After a period of recovery from previous sex steroid hormone therapy, inappropriately high FSH and LH levels in the presence of normal male levels of testosterone and estradiol were found. The latter normal levels failed to suppress both the FSH and LH levels. From the clomiphene challenge tests carried out before and after the sex reassignment operation, the estradiol infusion studies and treatment with ethinyl estradiol after the sex reassignment operation, it appears that the hypersecretion of gonadotropins was responsive to the negative feedback effect of estrogens. However, the sensitivity, especially that of FSH, was very attenuated. Even after 23 weeks of ethinyl estradiol treatment FSH remained well above the upper limit for normal men. The results showed that before his sex change operation the hypersecretion of gonadotropins in the patient was probably under autonomous control. Testicular factors at normal male concentrations appear to have a minimal negative feedback effect on the hypersecretion of gonadotropins. However, hypersecretion of gonadotropins can be suppressed by prolonged exposure to estrogens.
authors.affiliation: Department of Obstetrics and Gynaecology, National University Hospital, National University of Singapore.
authors.forename: H H
authors.initials: HH
authors.lastname: Goh
authors.forename: S S
authors.initials: SS
authors.lastname: Ratnam
mesh_terms: D000284:Administration, Oral; D000328:Adult; D002996:Clomiphene / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004958:Estradiol / Q000494:pharmacology; D004967:Estrogens / Q000494:pharmacology*; D005640:Follicle Stimulating Hormone / Q000032:analysis; D006062:Gonadotropins / Q000378:metabolism*; D006801:Humans; D007262:Infusions, Intravenous; D007986:Luteinizing Hormone / Q000032:analysis; D008297:Male; D009919:Orchiectomy; D011388:Prolactin / Q000032:analysis; D012738:Sex Hormone-Binding Globulin / Q000032:analysis; D013739:Testosterone / Q000032:analysis; D014189:Transsexualism / Q000628:therapy*
chemical_list: D004967:Estrogens; D006062:Gonadotropins; D012738:Sex Hormone-Binding Globulin; D002996:Clomiphene; D013739:Testosterone; D004958:Estradiol; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone