Yolk SacEgg YolkEmbryo, MammalianEmbryo, NonmammalianChick EmbryoEndodermal Sinus TumorVitelline MembraneEmbryo ImplantationEmbryonic DevelopmentMesonephromaEmbryonic and Fetal DevelopmentBlastocystGene Expression Regulation, DevelopmentalPregnancyEndodermEmbryo LossEndolymphatic SacAir SacsAnal SacsGestational SacHematopoiesis, ExtramedullarySpindle ApparatusCleavage Stage, OvumBlastomeresIn Situ HybridizationPlacentaGastrulaMesodermFertilization in VitroZebrafishExtraembryonic Membranesalpha-FetoproteinsGestational AgeMorphogenesisPinocytosisEgg ProteinsMolecular Sequence DataCulture TechniquesCell DifferentiationOocytesZygotePovidoneBody PatterningFetusRNA, MessengerDysgerminomaBlood VesselsTranscription FactorsMesonephrosHematopoietic Stem CellsMorulaEmbryo DispositionChimeraCryopreservationAmnionBase SequenceHematopoiesisTeratomaPregnancy Trimester, FirstTime FactorsOvumMitosisMicroscopy, ElectronZebrafish ProteinsMicrotubulesEctodermErythropoiesisAmino Acid SequenceBlastodermImmunohistochemistryPlacentationMutationMice, Inbred ICRTesticular NeoplasmsCell LineageFetal DeathChorionNeoplasms, Germ Cell and EmbryonalPhenotypeMice, Inbred C57BLGenes, LethalAllantoisErythroblastsDrosophila ProteinsOrgan Culture TechniquesHematopoietic SystemTeratogensXenopus ProteinsEmbryonic InductionHomeodomain ProteinsDrosophilaDNA-Binding ProteinsCell DivisionEmbryo ResearchMaternal-Fetal ExchangeChickensLiverSea Urchins