Gonadal Steroid HormonesTestosteroneEstradiolSex CharacteristicsOrchiectomyOvariectomySteroidsLuteinizing HormoneHormonesDihydrotestosteroneProgesteroneFollicle Stimulating HormoneGonadotropin-Releasing HormoneCastrationAndrogensTestosterone PropionateHypogonadismEstrogensReceptors, SteroidGonadal HormonesSexual MaturationTestisSex DifferentiationPituitary GlandReceptors, AndrogenThyroid HormonesLeuprolideEstrous CycleSex Hormone-Binding GlobulinOvarySexual Behavior, AnimalDehydroepiandrosteroneAndrostenedionePreoptic AreaGonadotropins, PituitaryHypothalamusAdrenocorticotropic HormoneHydrocortisoneGonadsEcdysoneRadioimmunoassayPituitary Hormone-Releasing HormonesReceptors, ProgesteroneGonadotropinsFollicle Stimulating Hormone, beta SubunitPituitary Gland, AnteriorProlactinEpitestosteroneReproductionMenstrual CycleRNA, MessengerReceptors, EstrogenHormone Replacement TherapyParathyroid HormoneAdrenal GlandsKisspeptinsRats, Sprague-DawleyEcdysteroneAndrosteroneHypothalamus, MiddleReceptors, Thyroid HormoneEstroneEstrusPregnancyHuman Growth HormoneArcuate Nucleus3-Hydroxysteroid DehydrogenasesSheep17-Hydroxysteroid Dehydrogenases3-Oxo-5-alpha-Steroid 4-DehydrogenaseFollicular PhaseGene Expression RegulationReceptors, GlucocorticoidAndrostanesNeurosecretory SystemsNeurokinin BPregnenoloneAromataseAgingReceptors, LHRHAnalysis of VarianceFlutamideEstrogen Receptor alphaChorionic GonadotropinBrainDexamethasoneAnabolic AgentsEtiocholanoloneGlucocorticoidsHydroxyprogesteronesRats, Inbred StrainsSteroid 17-alpha-HydroxylasePituitary HormonesTestosterone CongenersHormone AntagonistsOrgan SizeDehydroepiandrosterone Sulfate17-alpha-HydroxyprogesteroneProgestinsSex Factors