No abstract available
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Abnormalities, Multiple / embryology
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Abnormalities, Multiple / physiopathology
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Adult
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Female
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Heart Defects, Congenital / embryology
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Heart Defects, Congenital / physiopathology*
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Humans
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Pregnancy
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Regional Blood Flow
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Twins*
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Twins, Monozygotic*
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Ultrasonography*
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Umbilical Arteries / physiopathology*
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Umbilical Veins / physiopathology*