OvariectomyCastrationEstradiolEstrogensOvaryProgesteroneUterusEstrusLuteinizing HormoneDiestrusFollicle Stimulating HormoneOsteoporosisRats, Sprague-DawleyOrgan SizeSexual MaturationEstrogen Replacement TherapyFemurPregnancy, AnimalEstrous CycleGonadal Steroid HormonesBone DensityProestrusBone ResorptionMammary Neoplasms, ExperimentalOvulationTestosteroneBody WeightTibiaBone and BonesSex CharacteristicsAnestrusPituitary GlandBone Diseases, MetabolicPerphenazineProlactinPregnancyDrug ImplantsEstrogen Receptor alphaOrchiectomyRats, WistarOvarian FollicleMetestrusEstrogen Receptor betaMethylnitrosoureaSheepNorpregnenesTooth SocketX-Ray MicrotomographyGonadotropin-Releasing HormoneReceptors, EstrogenRaloxifeneRats, Inbred StrainsEstrogen AntagonistsTime FactorsBone Remodeling9,10-Dimethyl-1,2-benzanthraceneMetrial GlandGonadotropins, PituitaryAlendronatePseudopregnancyGastric DilatationAgingMammary Glands, AnimalDisease Models, AnimalPhytoestrogensEmbryo Implantation, DelayedMedroxyprogesteroneMaprotilineInhibinsMice, Inbred C57BLOsteoclastsRandom AllocationFeedbackOvum TransportHarderian GlandBone Density Conservation AgentsVaginaStiflePituitary Hormone-Releasing HormonesCissusCorpus LuteumOsteoporosis, PostmenopausalAdrenalectomySecretory RateLagomorphaStomach VolvulusRNA, MessengerOsteogenesisMesocricetus