HypogonadismTestosteroneKallmann SyndromePuberty, DelayedLuteinizing HormoneAndrogensSex Hormone-Binding GlobulinHormone Replacement TherapyTestisGonadotropin-Releasing HormoneTestosterone PropionateFollicle Stimulating HormoneGonadotropinsAndropauseKlinefelter SyndromeDihydrotestosteroneOrchiectomyEstradiolGynecomastiaEunuchismGonadal Steroid HormonesLibidoEndocrine System DiseasesErectile DysfunctionLeuprolideReceptors, LHRHGonadotropins, PituitaryDAX-1 Orphan Nuclear ReceptorAmenorrheaEpitestosteroneLuteinizing Hormone, beta SubunitHypopituitarismChorionic GonadotropinCastrationPubertyTestosterone CongenersCHARGE SyndromeAndrostenedioneOlfaction DisordersPituitary GlandSpermatogenesisInfertility, MaleSperm CountSexual MaturationHypothalamic DiseasesHormonesKisspeptinsReceptors, AndrogenFlutamideCryptorchidismSex CharacteristicsOrgan SizeGonadal DisordersSyndromeSexual Dysfunction, PhysiologicalProgesteroneHyperprolactinemiaHypothalamo-Hypophyseal SystemReceptor, Fibroblast Growth Factor, Type 1InhibinsProlactinDehydroepiandrosteroneAdrenal InsufficiencyEjaculationOrgasmSteroids3-Oxo-5-alpha-Steroid 4-DehydrogenaseAnabolic AgentsSeminiferous TubulesAdministration, CutaneousSex Chromosome AberrationsDrug ImplantsPrader-Willi SyndromeGonadal Dysgenesis, 46,XXDehydroepiandrosterone SulfatePedigreeAgingOligospermiaSertoli CellsMenotropinsEstrogensReproductionInjections, IntramuscularOvary