SpermatogoniaStage-Specific Embryonic AntigensStem CellsStem Cell TransplantationSpermatogenesisTestisAdult Stem CellsSeminiferous TubulesCell DifferentiationHematopoietic Stem CellsPluripotent Stem CellsEmbryonic Stem CellsStem Cell NicheStem Cell FactorGlial Cell Line-Derived Neurotrophic FactorStem Cell ResearchGlial Cell Line-Derived Neurotrophic Factor ReceptorsGerm CellsCell Culture TechniquesSertoli CellsInduced Pluripotent Stem CellsProto-Oncogene Proteins c-kitHematopoietic Stem Cell TransplantationFertility PreservationCells, CulturedInseminationOctamer Transcription Factor-3Neural Stem CellsMesenchymal Stromal CellsMultipotent Stem CellsInfertility, MaleCell ProliferationCell LineageHematopoietic Cell Growth FactorsCell SeparationCryopreservationTransplantation, HeterologousIntegrin alpha6Antigens, CD34Cell TransplantationMice, TransgenicCryptorchidismFlow CytometryMesenchymal Stem Cell TransplantationSpermatozoaMice, SCIDMice, Inbred C57BLBone Marrow CellsHematopoiesisRegenerative MedicineBusulfanMice, Inbred NODGreen Fluorescent ProteinsColony-Forming Units AssayCell DivisionSemen PreservationFetal BloodSpermatocytesCell SurvivalAntigens, Thy-1Biological MarkersSpermatidsImmunomagnetic SeparationFertilityGene Expression ProfilingProto-Oncogene Proteins c-retKruppel-Like Transcription FactorsPlant StemsCoculture TechniquesImmunohistochemistryPhenotypeCell LineFetal Stem CellsReverse Transcriptase Polymerase Chain ReactionTransplantation, AutologousAntigens, CD9Signal TransductionTissue EngineeringSeminiferous EpitheliumBlood-Testis BarrierTime FactorsAntigens, CDHematopoietic Stem Cell Mobilization