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-DehydrogenaseHyperandrogenismLeuprolideProstateAndrogen AntagonistsComb and WattlesRadioimmunoassayChorionic GonadotropinTestosterone CongenersAgingAndropauseEpitestosteroneErectile DysfunctionDehydroepiandrosteronePaternal Behavior17-Hydroxysteroid DehydrogenasesReproductionGonadotropinsCryptorchidismAgonistic BehaviorSeminiferous TubulesAromataseHormonesSertoli CellsDibutyl PhthalateTerritorialitySteroidsAscarididaEpididymisProlactinSeminal VesiclesPuberty3-Hydroxysteroid DehydrogenasesInfertility, MaleBody WeightDrug ImplantsKlinefelter SyndromeFertilityProgesteroneSteroid 17-alpha-HydroxylaseAdministration, CutaneousProstatic NeoplasmsCholestenone 5 alpha-ReductaseInhibinsGonadotropins, PituitarySeasonsPituitary GlandEstrogensAphrodisiacsEstroneGynecomastiaContraceptive Agents, MaleCopulationSalivaTime FactorsNandroloneYttrium Isotopes46, XY Disorders of Sex DevelopmentPenile ErectionDiethylstilbestrolHydrocortisoneFeminizationRats, Sprague-DawleyPenisSemenHornsSocial DominanceSperm Motility