Vitamin DVitamin D DeficiencyOsteoporosisPostmenopauseOsteoporosis, PostmenopausalBone DensityVitaminsCalcifediolEstrogen Replacement TherapySunlightCholecalciferolVitamin ABone Density Conservation AgentsReceptors, CalcitriolDietary SupplementsMenopauseParathyroid HormoneFractures, BoneRisk FactorsVitamin EVitamin D-Binding ProteinEstrogens, Conjugated (USP)Estrogens25-Hydroxyvitamin D 2ErgocalciferolsPremenopauseCalcitriolCalcium, DietaryAbsorptiometry, PhotonCase-Control StudiesWomen's HealthVitamin B 12Breast NeoplasmsBone and BonesCross-Sectional StudiesOsteoporotic FracturesAlendronateAromatase InhibitorsVitamin A DeficiencyEstradiolHormone Replacement TherapyBiological MarkersProspective StudiesBone Diseases, MetabolicDiphosphonatesRaloxifeneDietMyalgiaSeasonsDouble-Blind MethodBody Mass IndexCohort Studies25-Hydroxyvitamin D3 1-alpha-HydroxylaseFemur NeckIsoflavonesCalciumTamoxifenSex Hormone-Binding GlobulinNitrilesEstroneTeriparatideEtidronic AcidSecondary CareBone ResorptionMedroxyprogesterone AcetateTriazolesSelective Estrogen Receptor ModulatorsFractures, SpontaneousSpinal FracturesBone RemodelingPrevalenceWomenHydroxycholecalciferolsClimactericVitamin K 1Antineoplastic Agents, HormonalCholestanetriol 26-MonooxygenaseSkin PigmentationGonadal Steroid HormonesLumbar VertebraeSunscreening AgentsRicketsProgestinsQuestionnairesNorpregnenesHot FlashesMedroxyprogesteroneIncidenceTreatment OutcomeUnited StatesHip FracturesEuropean Continental Ancestry GroupPerimenopauseLogistic ModelsVitamin B 6Linear ModelsOsteocalcinOdds RatioAge FactorsPhytoestrogens