title: The response of inhibin to human chorionic gonadotrophin is decreased in senescent men compared with young men.
abstract: Inhibin and testosterone were measured in the serum of young and old men with proven fertility before and after stimulation with human chorionic gonadotrophin (hCG) in order to characterize endocrinological changes in senescence further. While there was a significant increase of both hormones in all young men, there was a decreased response of serum testosterone and an insignificant increase in inhibin in the older men. Although basal hormone levels and ejaculate parameters were not different, hCG stimulation revealed that there were decreased secretory capacities of Leydig as well as of Sertoli cells in old age.
authors.affiliation: Institute of Reproductive Medicine of the University, Münster, Federal Republic of Germany.
authors.forename: U
authors.initials: U
authors.lastname: Fingscheidt
authors.forename: E
authors.initials: E
authors.lastname: Nieschlag
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000097:blood*; D006063:Chorionic Gonadotropin / Q000494:pharmacology*; D006801:Humans; D007265:Inhibins / Q000097:blood*; D008297:Male; D008875:Middle Aged; D013739:Testosterone / Q000097:blood
chemical_list: D006063:Chorionic Gonadotropin; D013739:Testosterone; D007265:Inhibins