title: Isolated FSH deficiency in a male. A case report.
abstract: This report describes the case of a 26-year-old man investigated because of infertility. The patient appeared healthy with normal sexual activity, physical appearance and karyotype. Repeated semen analyses showed a marked oligozoospermia. A testicular biopsy specimen revealed arrested spermatogenesis and normal Leydig cells. Hormone analyses were normal except for a markedly reduced serum FSH level. Only a few such cases have been previously reported.
mesh_terms: D000328:Adult; D005640:Follicle Stimulating Hormone / Q000172:deficiency*; D006801:Humans; D008297:Male; D009845:Oligospermia / Q000209:etiology*
chemical_list: D005640:Follicle Stimulating Hormone