mortality/aging
• about 95% of embryos died by E11
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• embryos surviving past E11 were superficially normal at E18.5 but still not born alive
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embryo
• failure of yolk sac angiogenesis in embryos dying before E11
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hematopoietic system
• mice surviving past E11 with normal fetal liver hematopoiesis
• markedly reduced bone marrow hematopoiesis
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cardiovascular system
• failure of yolk sac angiogenesis in embryos dying before E11
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