TestosteroneTestosterone PropionateHypogonadismAndrogensOrchiectomyDihydrotestosteroneTestisSex Hormone-Binding GlobulinLuteinizing HormoneEstradiolGonadal Steroid HormonesEpitestosteroneCastrationAndrostenedioneFollicle Stimulating HormoneDriveFlutamideTestosterone CongenersReceptors, AndrogenSexual MaturationDehydroepiandrosterone3-Oxo-5-alpha-Steroid 4-DehydrogenaseGonadotropin-Releasing HormoneOrgan SizeHormone Replacement TherapyDrug ImplantsDehydroepiandrosterone SulfateSpermatogenesisSex CharacteristicsSexual Behavior, AnimalRadioimmunoassayLibidoAndrogen AntagonistsChorionic GonadotropinProstateProgesteroneAromataseHirsutismAndrostanesVirilismGenitalia, MaleCyproteroneSteroidsSperm CountGonadotropins, PituitarySeminal VesiclesHormonesAndrostane-3,17-diol17-Hydroxysteroid DehydrogenasesAndrosteroneCyproterone Acetate17-Ketosteroids5-alpha Reductase Inhibitors17-alpha-HydroxyprogesteroneContraceptive Agents, MaleCholestenone 5 alpha-ReductaseHydroxytestosteronesEstrogensLeuprolideSertoli CellsSeminiferous TubulesGonadotropinsEstroneAdministration, CutaneousNandrolonePituitary GlandSeasons3-Hydroxysteroid DehydrogenasesInhibinsAgingSteroid 17-alpha-HydroxylasePolycystic Ovary SyndromeProlactinHyperandrogenismFinasterideReproductionRats, Sprague-DawleyAnabolic AgentsEpididymisHydrocortisoneHydroxyprogesteronesCytochrome P-450 Enzyme SystemSteroid 16-alpha-HydroxylaseTime FactorsSteroid HydroxylasesAzasteroidsBody WeightOvaryCryptorchidismSex DifferentiationAndrogen-Insensitivity SyndromeTranssexualismScrotumSheepDose-Response Relationship, DrugCopulationAndropauseDoping in SportsProstatic NeoplasmsErectile Dysfunction