AmphibiansOocytesTriturusBufo arenarumOvumCell NucleusPleurodelesXenopusXenopus laevisNotophthalmus viridescensSalamandridaeUrodelaOogenesisRana pipiensChytridiomycotaMeiosisCell NucleolusMicroinjectionsEgg ProteinsCytoplasmAmphibian ProteinsChromosomesRanidaeNucleoproteinsAnuraProgesteroneBufonidaeMolecular Sequence DataOocyte DonationRNAOocyte RetrievalProtein BiosynthesisNucleus AccumbensTranscription, GeneticAmbystomaRanavirusAmbystoma mexicanumThalamic NucleiSolitary NucleusIn Vitro Oocyte Maturation TechniquesMolecular WeightReptilesAmphibian VenomsMetamorphosis, BiologicalCochlear NucleusFertilizationRaphe NucleiMetaphaseActive Transport, Cell NucleusBlastocystCerebellar NucleiSeptal NucleiAmino Acid SequenceXenopus ProteinsArcuate NucleusCaudate NucleusParaventricular Hypothalamic NucleusLarvaEmbryonic DevelopmentParthenogenesisEmbryo, NonmammalianSperm-Ovum InteractionsOvaryCumulus CellsRNA, MessengerBufo marinusRana catesbeianaMycosesSpermatozoaBase SequenceSuprachiasmatic NucleusCryopreservationRed NucleusSperm Injections, IntracytoplasmicCleavage Stage, OvumTrigeminal NucleiEmbryo TransferZygotePondsMaturation-Promoting FactorNuclear Transfer TechniquesSubthalamic NucleusTime FactorsNeuronsAnimal DiseasesSupraoptic NucleusCells, CulturedGene Expression Regulation, DevelopmentalZona PellucidaSpecies SpecificityEndangered SpeciesMammalsPregnancyDNA Virus InfectionsGastrulaCloning, MolecularMicroscopy, ElectronEmbryo Culture TechniquesRana esculentaEmbryonic and Fetal Development