Stem CellsUmbilical VeinsUmbilical ArteriesHematopoietic Stem CellsStem Cell TransplantationEmbryonic Stem CellsAdult Stem CellsPluripotent Stem CellsHematopoietic Stem Cell TransplantationStem Cell NicheNeural Stem CellsInduced Pluripotent Stem CellsCell DifferentiationMesenchymal Stem Cell TransplantationMultipotent Stem CellsMesenchymal Stromal CellsStem Cell FactorFetal BloodHernia, UmbilicalCells, CulturedCell LineageStem Cell ResearchFetal Stem CellsPlant StemsCell ProliferationCord Blood Stem Cell TransplantationHuman Umbilical Vein Endothelial CellsHematopoietic Stem Cell MobilizationBone Marrow CellsNeoplastic Stem CellsUmbilicusCell Culture TechniquesRegenerationAntigens, CD34Cell SeparationOctamer Transcription Factor-3Flow CytometryHematopoiesisPregnancyRegenerative MedicineTransplantation, AutologousEndothelium, VascularTransplantation, HomologousPeripheral Blood Stem Cell TransplantationSignal TransductionEndothelial CellsTotipotent Stem CellsMice, Inbred C57BLColony-Forming Units AssayEmbryo, MammalianMice, SCIDTissue EngineeringSOXB1 Transcription FactorsCell LineCell- and Tissue-Based TherapySpermatogoniaReverse Transcriptase Polymerase Chain ReactionCoculture TechniquesFetusCell SurvivalGene Expression Regulation, DevelopmentalCell DivisionCell MovementUltrasonography, PrenatalAntigens, CDProto-Oncogene Proteins c-kitTime FactorsGene Expression ProfilingGene Expression RegulationBiological MarkersNestinImmunohistochemistryPhenotypeModels, BiologicalHomeodomain ProteinsTransplantation ConditioningGerm CellsHair FollicleRNA, MessengerBrain StemEmbryo ResearchInfant, NewbornGraft vs Host DiseaseMice, TransgenicNeuronsBone Marrow TransplantationTranscription FactorsGreen Fluorescent ProteinsBone MarrowCell DedifferentiationCell AdhesionCell TransplantationGene ExpressionMice, Inbred NODGestational AgeTransplantation, HeterologousNeovascularization, PhysiologicTissue ScaffoldsChondrogenesisTeratoma