Research Embryo CreationBlastocystFertilization in VitroFertilizationEmbryonic DevelopmentMorulaEmbryo, MammalianEmbryo Culture TechniquesEmbryonic and Fetal DevelopmentEmbryo TransferEmbryo ImplantationCleavage Stage, OvumZygoteOocytesPregnancyCryopreservationParthenogenesisCloning, OrganismSpermatozoaBlastomeresNuclear Transfer TechniquesSperm Injections, IntracytoplasmicCulture TechniquesZona PellucidaBlastocyst Inner Cell MassEmbryo, NonmammalianEctogenesisSperm-Ovum Interactions