MicromanipulationGrasshoppersSpermatocytesZona PellucidaEmbryo TransferFertilization in VitroNuclear Transfer TechniquesChromosomesMicroscopy, InterferenceTechnologyTwins, MonozygoticZygoteClone CellsSewageSpermatozoaMicroinjectionsSpindle ApparatusBlastocystCryopreservationEmbryonic and Fetal DevelopmentSperm Injections, IntracytoplasmicPregnancyBiomedical TechnologyEmbryo, MammalianBiophysicsOocytesPolymerase Chain ReactionRNA, Ribosomal, 16STechnology Assessment, Biomedical