ParthenogenesisOocytesStem CellsHematopoietic Stem CellsStem Cell TransplantationEmbryonic Stem CellsAdult Stem CellsMetaphaseCryopreservationFertilization in VitroPluripotent Stem CellsMeiosisOogenesisHematopoietic Stem Cell TransplantationOocyte DonationStem Cell NicheSperm Injections, IntracytoplasmicCryoprotective AgentsFertilizationNeural Stem CellsInduced Pluripotent Stem CellsBlastocystZona PellucidaPropylene GlycolCell DifferentiationIn Vitro Oocyte Maturation TechniquesOocyte RetrievalMultipotent Stem CellsMesenchymal Stem Cell TransplantationSperm-Ovum InteractionsEmbryonic DevelopmentPolar BodiesStem Cell FactorEmbryo, MammalianMesenchymal Stromal CellsMicroinjectionsCumulus CellsCells, CulturedEthylene GlycolZygoteReproductive TechniquesVitrificationEmbryo Culture TechniquesSpermatozoaCell LineageMicroscopy, PolarizationAneuploidyPregnancyStem Cell ResearchOvaryEmbryo TransferMeiotic Prophase ICell Culture TechniquesPlant StemsCleavage Stage, OvumFetal Stem CellsXenopus laevis