TestosteroneHypogonadismTestisSex Hormone-Binding GlobulinAndrogensLuteinizing HormoneOrchiectomyTestosterone PropionateGonadal Steroid HormonesEstradiolFollicle Stimulating HormoneDihydrotestosteroneDehydroepiandrosterone SulfateOrgan SizeLibidoAndrostenedioneSpermatogenesisLeydig CellsGonadotropin-Releasing HormoneCastrationVirilismSexual MaturationSperm CountHirsutismHormone Replacement TherapySexual Behavior, AnimalReceptors, AndrogenFlutamideSex CharacteristicsGenitalia, Male17-alpha-HydroxyprogesteronePolycystic Ovary Syndrome3-Oxo-5-alpha-Steroid 4-DehydrogenaseHyperandrogenismLeuprolideProstateComb and WattlesAndrogen AntagonistsTestosterone CongenersAndropauseEpitestosteroneRadioimmunoassayChorionic GonadotropinErectile DysfunctionAgingDehydroepiandrosteronePaternal Behavior17-Hydroxysteroid DehydrogenasesGonadotropinsCryptorchidismAgonistic BehaviorReproductionSeminiferous TubulesAromataseHormonesSertoli CellsDibutyl PhthalateTerritorialitySteroidsAscarididaEpididymisProlactinSeminal VesiclesPuberty3-Hydroxysteroid DehydrogenasesInfertility, MaleDrug ImplantsKlinefelter SyndromeSteroid 17-alpha-HydroxylaseAdministration, CutaneousFertilityBody WeightProgesteroneCholestenone 5 alpha-ReductaseInhibinsGonadotropins, PituitaryPituitary GlandAphrodisiacsEstroneEstrogensGynecomastiaContraceptive Agents, MaleProstatic NeoplasmsCopulationSalivaNandroloneSeasonsYttrium Isotopes46, XY Disorders of Sex DevelopmentPenile ErectionDiethylstilbestrolHydrocortisoneFeminizationPenisSemenHornsSocial DominanceRats, Sprague-DawleySperm MotilityAzoospermia