Bone MarrowBone Marrow CellsBone Marrow TransplantationBone and BonesResearchFetusFetal Tissue TransplantationComplicityBone RemodelingBone Marrow DiseasesAborted FetusBone Marrow ExaminationBone Marrow NeoplasmsHematopoietic Stem CellsBone DensityResearch Support as TopicDirected Tissue DonationBone ResorptionPregnancyResearch DesignMaternal-Fetal ExchangeBone Marrow PurgingEthics, ResearchPlacentaLifeResearch PersonnelHematopoiesisBone NeoplasmsCell DifferentiationMice, Inbred C57BLPersonhoodTransplantation, HomologousNursing ResearchBone DevelopmentBeginning of Human LifeAbortion, VeterinaryBone DiseasesColony-Forming Units AssayCells, CulturedTranslational Medical ResearchHealth Services ResearchBone RegenerationFetal ResearchTransplantation, AutologousWhole-Body IrradiationTime FactorsRadiation ChimeraStromal CellsGraft vs Host DiseaseAnemia, AplasticGenetic ResearchFlow CytometryOsteogenesisGestational AgeLeukemiaSpleenBone MatrixBone TransplantationAntigens, CD34Nontherapeutic Human ExperimentationGranulocytesLiverTherapeutic Human ExperimentationOsteoblastsHematopoietic Stem Cell TransplantationRNA, MessengerCivil RightsClinical Nursing ResearchOsteoclastsMice, Inbred BALB CPregnancy, AnimalMultiple MyelomaTransplantation ChimeraCell SeparationStem CellsLeukemia, Myeloid, AcuteTissue DistributionPancytopeniaAntibodies, MonoclonalBone SubstitutesDisease Models, Animal