Blood DonorsPlacentaHematopoietic Stem CellsHematopoietic Stem Cell TransplantationStem CellsTissue DonorsHematopoiesisPlacenta DiseasesPlacenta PreviaTransplantation, HomologousPlacenta AccretaPregnancyHematopoietic Stem Cell MobilizationBlood BanksAntigens, CD34Placenta, RetainedLiving DonorsCell LineageBone Marrow CellsStem Cell TransplantationStem Cell NicheSeroepidemiologic StudiesDonor SelectionColony-Forming Units AssayCell DifferentiationMice, Inbred C57BLFetal BloodTrophoblastsGraft vs Host DiseaseBlood TransfusionFlow CytometryAdult Stem CellsBlood SafetyCells, CulturedNeoplastic Stem CellsBone Marrow TransplantationBone MarrowPlant StemsTransplantation ConditioningHematopoietic SystemStem Cell FactorGraft SurvivalMultipotent Stem CellsHematologic NeoplasmsCell SeparationMesonephrosPolymerase Chain ReactionCell ProliferationHepatitis C AntibodiesHepatitis CEnzyme-Linked Immunosorbent AssayFetusPluripotent Stem CellsMice, SCIDTransplantation, AutologousHepatitis BTime FactorsMaternal-Fetal ExchangeChorionic VilliFetal Stem CellsHepatitis B Surface AntigensCord Blood Stem Cell TransplantationWhole-Body IrradiationMice, Inbred NODHistocompatibility TestingMolecular Sequence DataHepatitis, Viral, HumanHTLV-II InfectionsTransplantation ChimeraChimerismReverse Transcriptase Polymerase Chain ReactionTorque teno virusBase SequenceProto-Oncogene Proteins c-kitAntigens, CDLentivirusLeukemiaDNA Virus InfectionsMice, KnockoutMesenchymal Stromal CellsTransduction, GeneticYolk SacMyeloid Progenitor CellsGranulocyte Colony-Stimulating FactorRetrospective StudiesPregnancy ProteinsPlacentationInduced Pluripotent Stem CellsHepatitis AntibodiesRadiation ChimeraRetroviridaeLymphopoiesisHematopoiesis, ExtramedullaryNeural Stem CellsMice, TransgenicGenetic VectorsMesenchymal Stem Cell TransplantationPrevalenceGenotypeHistocompatibility