Polar BodiesOocytesMeiosisOogenesisPreimplantation DiagnosisMetaphaseParthenogenesisFertilizationCleavage Stage, OvumZygoteIn Vitro Oocyte Maturation TechniquesSperm Injections, IntracytoplasmicAneuploidyOvumStarfishOocyte DonationMicroinjectionsBlastocystBlastomeresCumulus CellsSpindle ApparatusSperm-Ovum InteractionsOocyte RetrievalEmbryonic DevelopmentXenopus laevisFertilization in VitroEmbryo TransferAsymmetric Cell DivisionChromosomesProto-Oncogene Proteins c-mosMaturation-Promoting FactorPregnancyZona PellucidaSpermatozoaGenes, mosCryopreservationNuclear Transfer TechniquesXenopusEmbryo, MammalianCell NucleusOvaryEmbryonic and Fetal DevelopmentCytoplasmCytokinesisEmbryo Culture TechniquesPregnancy RateMicrotubulesBivalviaCell Nucleus DivisionInseminationCytogenetic AnalysisCell PolarityChromatidsOvulationChromosomes, MammalianCyclin BChromosomes, HumanCyclin B1Infertility, FemaleMaternal AgeSuperovulationChromosome SegregationNocodazoleMice, Inbred StrainsMicroscopy, PolarizationCells, CulturedProtamine KinaseHaploidyChorionic GonadotropinCytochalasin BUrochordataCentrosomeMicroscopy, ConfocalTubulinXenopus ProteinsDemecolcineMice, Inbred CBAMicroscopy, FluorescenceDiploidyIn Situ Hybridization, FluorescenceMice, Inbred ICRRNA, MessengerMicromanipulationSwineCDC2 Protein KinasePregnancy OutcomeRNA, ComplementaryTime FactorsCytoskeletonPloidiesActinsCattleComparative Genomic HybridizationChromosome AberrationsEgg ProteinsTubulin ModulatorsGene Expression Regulation, DevelopmentalFollicular FluidOvulation InductionCell Aging