Gonadal Steroid HormonesEstradiolTestosteroneSex CharacteristicsOvariectomyOrchiectomySteroidsLuteinizing HormoneHormonesProgesteroneFollicle Stimulating HormoneDihydrotestosteroneGonadotropin-Releasing HormoneEstrogensCastrationReceptors, SteroidOvaryEstrous CycleGonadal HormonesEstrusAndrogensReceptors, EstrogenSexual MaturationPituitary GlandMenstrual CycleProgestinsThyroid HormonesSex DifferentiationPregnancyMifepristoneUterusProgesterone CongenersLeuprolideCorpus LuteumHypothalamusAdrenocorticotropic HormoneTestosterone PropionatePreoptic AreaPituitary Hormone-Releasing HormonesReceptors, AndrogenProlactinRadioimmunoassaySexual Behavior, AnimalEcdysoneHormone AntagonistsGonadotropins, PituitaryRNA, MessengerFollicular PhaseReceptors, ProgesteroneGonadsHypogonadismEndometriumFollicle Stimulating Hormone, beta SubunitGonadotropinsDehydroepiandrosteronePituitary Gland, AnteriorSheepHydroxyprogesteronesHydrocortisoneOvulationLuteal PhasePregnenoloneAndrostenedionePregnancy, AnimalParathyroid HormoneReproductionAdrenal GlandsEcdysteroneKisspeptinsEstrogen Receptor alpha3-Hydroxysteroid DehydrogenasesReceptors, GlucocorticoidOviductsGene Expression RegulationEstroneChorionic GonadotropinRats, Sprague-DawleyReceptors, Thyroid HormoneHypothalamus, MiddleArcuate NucleusTestisImmunohistochemistryNeurosecretory SystemsBreast NeoplasmsGranulosa CellsNeurokinin BReceptors, LHRHDexamethasoneAnalysis of VarianceHuman Growth Hormone20-alpha-DihydroprogesteronePseudopregnancyBrainOvarian FollicleLuteal CellsCholesterol Side-Chain Cleavage EnzymeDinoprostRats, Inbred StrainsPituitary HormonesHormone Replacement Therapy