No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Female
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Humans
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Pregnancy
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Pregnancy Trimester, Second
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Ultrasonography, Doppler, Color
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Ultrasonography, Prenatal / methods*
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Ultrasonography, Prenatal / standards
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Umbilical Arteries / embryology
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Umbilical Cord / diagnostic imaging*
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Umbilical Cord / embryology
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Umbilical Veins / embryology