OsteoporosisOsteoporosis, PostmenopausalBone DensityOsteoporotic FracturesFractures, BoneAbsorptiometry, PhotonRisk AssessmentBone Density Conservation AgentsRisk FactorsDiphosphonatesFractures, SpontaneousAlendronateBone and BonesBone Diseases, MetabolicTeriparatideSpinal FracturesEtidronic AcidBone RemodelingBone ResorptionFemur NeckLumbar VertebraeHip FracturesRaloxifeneFemurOsteoclastsCalcaneusCalcium, DietaryOsteoblastsVitamin DSelective Estrogen Receptor ModulatorsGlucocorticoidsSpineOsteogenesisCalcitoninOsteocalcinHipRANK LigandOvariectomyEstrogen Replacement TherapyParathyroid HormoneBone DiseasesOsteoprotegerinDensitometryIliumAlkaline PhosphataseAccidental FallsPostmenopauseRadiusCollagen Type I