Osteoporosis, PostmenopausalOsteoporosisBone Density Conservation AgentsEstrogensBone DensityAlendronatePostmenopauseEtidronic AcidDiphosphonatesFractures, BoneTeriparatideBone ResorptionOvariectomyRaloxifeneBone and BonesSelective Estrogen Receptor ModulatorsReceptors, EstrogenOsteoporotic FracturesBone RemodelingEstrogen Replacement TherapyFractures, SpontaneousMenopauseEstrogen Receptor alphaSpinal FracturesEstradiolEstrogens, Conjugated (USP)Lumbar VertebraeAbsorptiometry, PhotonSpinal InjuriesFemur NeckOsteoclastsBone Diseases, MetabolicEstrogen Receptor betaThiophenesPhytoestrogensOsteocalcinRANK LigandFemurCalcitoninRepublic of BelarusBreast NeoplasmsCalcium, DietaryOsteoprotegerinOrganometallic CompoundsParathyroid HormoneDouble-Blind MethodOsteoblastsHydroxycholecalciferolsDrug Administration ScheduleRisk FactorsUbiquitin ThiolesteraseUbiquitin-Specific ProteasesAdministration, OralBiological MarkersPremenopauseTamoxifenCollagen Type IAromatase InhibitorsHormone Replacement TherapyAlkaline PhosphataseEstroneCalciumTreatment OutcomeProgestinsTime FactorsMedroxyprogesterone AcetatePatient ComplianceEstrogens, CatecholAntineoplastic Agents, HormonalIsoflavonesGonadal Steroid HormonesTriazolesEstrogens, Non-SteroidalHip FracturesSex Hormone-Binding GlobulinDose-Response Relationship, DrugReceptors, ProgesteroneNitrilesAromataseMedroxyprogesteroneClimactericDisease Models, AnimalVitamin DNorpregnenesCase-Control StudiesEstradiol CongenersCalcaneusRats, Sprague-DawleyPerimenopauseHot FlashesSpineWomen's HealthTestosteroneRadiusProspective StudiesEndometrial NeoplasmsUterine HemorrhageNeoplasms, Hormone-DependentHipUterus