Cumulus CellsOocytesFertilization in VitroIn Vitro Oocyte Maturation Techniques4-Aminobenzoic AcidOvarian FollicleCattleOogenesisMeiosisOocyte RetrievalSperm-Ovum InteractionsOocyte DonationGranulosa CellsFertilizationBone Morphogenetic Protein 15OvaryXenopus laevisBlastocystGrowth Differentiation Factor 9Embryonic DevelopmentZona PellucidaFollicular FluidOvumSperm Injections, IntracytoplasmicOvulationParthenogenesisSpermatozoaEmbryo TransferMetaphaseXenopusMicroinjectionsChorionic GonadotropinEmbryo Culture TechniquesHyaluronoglucosaminidaseCryopreservation