Stem CellsStem Cell TransplantationHematopoietic Stem CellsEmbryonic Stem CellsSperm CountAdult Stem CellsSperm HeadPluripotent Stem CellsSperm CapacitationHematopoietic Stem Cell TransplantationStem Cell NicheNeural Stem CellsInduced Pluripotent Stem CellsCell DifferentiationMultipotent Stem CellsMesenchymal Stem Cell TransplantationStem Cell FactorMesenchymal Stromal CellsSperm MaturationCell LineageStem Cell ResearchSperm TransportPlant StemsSperm-Ovum InteractionsFetal Stem CellsSperm Injections, IntracytoplasmicAcrosomeInfertility, MaleCells, CulturedCell ProliferationFertilizationHematopoietic Stem Cell MobilizationSperm MidpieceNeoplastic Stem CellsBone Marrow CellsTestisSemenSperm BanksSemen PreservationRegenerationCell SeparationEpididymisOctamer Transcription Factor-3Cell Culture TechniquesFlow CytometryRegenerative MedicineTransplantation, AutologousHematopoiesisPeripheral Blood Stem Cell TransplantationSemen AnalysisMice, Inbred C57BLTotipotent Stem CellsEmbryo, MammalianAntigens, CD34Zona PellucidaTransplantation, HomologousCryopreservationSignal TransductionFertilitySOXB1 Transcription FactorsSpermatogoniaColony-Forming Units AssayEjaculationGene Expression Regulation, DevelopmentalGerm CellsCell- and Tissue-Based TherapyMice, SCIDTissue EngineeringCell SurvivalReverse Transcriptase Polymerase Chain ReactionProto-Oncogene Proteins c-kitModels, BiologicalCell LineSperm WhaleCord Blood Stem Cell TransplantationPhenotypeTime FactorsNestinOligospermiaGene Expression ProfilingBiological MarkersImmunohistochemistryMice, TransgenicHomeodomain ProteinsHair FollicleCoculture TechniquesOvumBrain StemEmbryo ResearchCell DivisionGreen Fluorescent ProteinsCell DedifferentiationNeuronsGene Expression RegulationBone Marrow TransplantationTranscription FactorsTeratomaFetal BloodAntigens, CDTransplantation Conditioning