Yolk SacEgg YolkEmbryo, MammalianEndodermal Sinus TumorEmbryo, NonmammalianChick EmbryoEndolymphatic SacAir SacsVitelline MembraneMesonephromaAnal SacsEmbryonic DevelopmentEmbryo ImplantationEmbryonic and Fetal DevelopmentEndodermPregnancyGestational SacBlastocystGene Expression Regulation, DevelopmentalEmbryo LossEgg ProteinsHematopoiesis, ExtramedullaryExtraembryonic MembranesPlacentaalpha-FetoproteinsPinocytosisGestational AgeZebrafishIn Situ HybridizationMesodermGastrulaFertilization in VitroCleavage Stage, OvumCell DifferentiationCulture TechniquesBlastomeresDysgerminomaFetusPovidoneHematopoietic Stem CellsBlood VesselsMorphogenesisPregnancy Trimester, FirstMolecular Sequence DataAmnionMesonephrosTeratomaOvumRNA, MessengerCryopreservationOocytesErythropoiesisChickensChimeraTranscription FactorsHematopoiesisBody PatterningTime FactorsPlacentationTesticular NeoplasmsBase SequenceZebrafish ProteinsNeoplasms, Germ Cell and EmbryonalEmbryo DispositionErythroblastsHematopoietic SystemChorionMorulaFetal DeathZygoteImmunohistochemistryOrgan Culture TechniquesMice, Inbred ICR