In Vitro Oocyte Maturation TechniquesOocytesOogenesisOvarian FollicleEmbryo Culture TechniquesOvaryFollicle Stimulating HormoneGranulosa CellsMeiosisOvulationHair FollicleFollicular FluidProgesteroneCumulus CellsTheca CellsXenopus laevisChorionic GonadotropinOocyte RetrievalEstradiolFertilizationOocyte DonationFollicular AtresiaXenopusLuteinizing HormoneMaturation-Promoting FactorOvumVitellogenesisGonadotropinsGenes, mosHydroxyprogesteronesGonadotropins, EquineEmbryonic Development