OvariectomyCatsCat DiseasesCastrationEstradiolEstrogensOvaryProgesteroneUterusEstrusLuteinizing HormoneDiestrusFollicle Stimulating HormoneRats, Sprague-DawleyOsteoporosisOrgan SizeSexual MaturationFemurEstrogen Replacement TherapyPregnancy, AnimalEstrous CycleGonadal Steroid HormonesBone DensityProestrusBone ResorptionMammary Neoplasms, ExperimentalBody WeightOvulationTestosteroneTibiaBone and BonesSex CharacteristicsPregnancyAnestrusPituitary GlandBone Diseases, MetabolicPerphenazineProlactinDrug ImplantsEstrogen Receptor alphaOrchiectomyRats, WistarOvarian FollicleTime FactorsMetestrusEstrogen Receptor betaMethylnitrosoureaSheepNorpregnenesTooth SocketX-Ray MicrotomographyGonadotropin-Releasing HormoneReceptors, EstrogenRats, Inbred StrainsRaloxifeneEstrogen AntagonistsBone Remodeling9,10-Dimethyl-1,2-benzanthraceneMetrial GlandDisease Models, AnimalGonadotropins, PituitaryAgingPseudopregnancyAlendronateGastric DilatationMammary Glands, AnimalPhytoestrogensEmbryo Implantation, DelayedFeedbackMedroxyprogesteroneMice, Inbred C57BLMaprotilineRandom AllocationInhibinsOsteoclastsSecretory RateRNA, MessengerVaginaOvum TransportHarderian GlandBone Density Conservation AgentsCorpus LuteumStiflePituitary Hormone-Releasing HormonesCissusOsteoporosis, PostmenopausalAdrenalectomyModels, AnimalLagomorphaAdrenal GlandsStomach VolvulusRadioimmunoassayMesocricetusOsteogenesis