OocytesEgg YolkWomenOvumWomen's HealthOogenesisEgg ProteinsOocyte DonationXenopus laevisOocyte RetrievalMeiosisFertilizationEgg ShellPregnancyEgg WhiteXenopusIn Vitro Oocyte Maturation TechniquesSperm-Ovum InteractionsMicroinjectionsPregnant WomenTime FactorsMetaphaseParthenogenesisBattered WomenParasite Egg CountZygoteSpermatozoaCryopreservationBlastocystCumulus CellsEmbryo TransferSperm Injections, IntracytoplasmicOvaryEmbryonic DevelopmentInfertility, FemaleZona PellucidaTreatment OutcomeWomen's Health ServicesWomen's RightsRetrospective StudiesPregnancy OutcomeEgg HypersensitivityCleavage Stage, OvumMaturation-Promoting FactorFollow-Up StudiesAge FactorsPostmenopauseQuestionnairesCohort StudiesRisk FactorsMolecular Sequence DataOvulation InductionOvipositionWomen, WorkingSex FactorsEmbryo Culture TechniquesUnited StatesPregnancy RateCross-Sectional StudiesCytoplasmOvulationNuclear Transfer TechniquesFertilityRNA, ComplementaryPhysicians, WomenRNA, MessengerCryoprotective AgentsCell NucleusProto-Oncogene Proteins c-mosReproductive Techniques, AssistedChorionic GonadotropinProgesteroneIncidenceCattleAmino Acid SequencePregnancy Complications, InfectiousEmbryonic and Fetal DevelopmentCase-Control StudiesFollicular FluidEmbryo, MammalianXenopus ProteinsVitelline MembraneLogistic ModelsVitrificationMenopauseBody Mass IndexInfant, NewbornCells, CulturedParityBase SequenceEstradiolRisk AssessmentSwineSurgical Procedures, OperativePolycystic Ovary SyndromePolar BodiesPremenopauseInfertilityMass ScreeningVagina