Oocyte DonationOocytesTissue DonorsFertilization in VitroPregnancy RateEmbryo TransferCryopreservationInfertility, FemalePregnancyBlood DonorsLiving DonorsOogenesisOocyte RetrievalXenopus laevisMeiosisIn Vitro Oocyte Maturation TechniquesXenopusMicroinjectionsFertilizationMetaphaseCumulus CellsBlastocystParthenogenesisOvumSperm-Ovum InteractionsOvaryEmbryonic DevelopmentSperm Injections, IntracytoplasmicSpermatozoaZona PellucidaMaturation-Promoting FactorZygoteNuclear Transfer TechniquesCleavage Stage, OvumEmbryo Culture TechniquesMolecular Sequence DataTissue and Organ HarvestingRNA, ComplementaryCells, CulturedTissue and Organ ProcurementEgg ProteinsOvulation InductionRNA, Messenger