In Vitro Oocyte Maturation TechniquesOocytesOogenesisEmbryo Culture TechniquesMeiosisChromosomesOocyte RetrievalChromosome MappingStarfishMaturation-Promoting FactorFertilizationFertilization in VitroCumulus CellsMetaphaseXenopus laevisOocyte DonationEmbryonic DevelopmentXenopusSperm Injections, IntracytoplasmicOvarian FollicleCryopreservationOvumBlastocystEmbryo TransferMicroinjectionsX ChromosomeChromosome BandingOvaryChorionic GonadotropinParthenogenesisChromosome AberrationsOvulation InductionGenes, mosSex ChromosomesMolecular Sequence DataSperm-Ovum Interactions