In Vitro Oocyte Maturation TechniquesOocytesEmbryo Culture TechniquesOogenesisFertilization in VitroFertilizationEmbryo TransferSperm-Ovum InteractionsSpermatozoaMeiosisPregnancyPregnancy RateOocyte RetrievalSperm Injections, IntracytoplasmicOvumInfertility, FemaleOvulation InductionBlastocystCumulus CellsEmbryonic DevelopmentZygoteZona PellucidaOvarian FollicleCryopreservationOocyte DonationFollicular FluidChorionic GonadotropinOvaryParthenogenesisCleavage Stage, OvumInfertilitySperm MotilityMicroinjectionsXenopus laevis