No abstract available
MeSH terms
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Cell-Free System
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Chromosome Disorders / diagnosis*
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DNA / blood*
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Female
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Humans
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Nuchal Translucency Measurement / methods*
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Pregnancy
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Pregnancy Trimester, First
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Pregnancy-Associated Plasma Protein-A / metabolism
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Prenatal Diagnosis / methods*
Substances
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DNA
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Pregnancy-Associated Plasma Protein-A
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PAPPA protein, human