No abstract available
MeSH terms
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Biomarkers / blood
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Chromosomes, Human, Pair 21*
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Down Syndrome / diagnosis*
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Down Syndrome / genetics*
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Female
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Fetus
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France
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Genetic Testing* / methods
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Gestational Age
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Humans
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Maternal Age
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Maternal Serum Screening Tests / methods
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Predictive Value of Tests
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Pregnancy
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Pregnancy Trimester, First
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Risk Factors
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Sensitivity and Specificity
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Ultrasonography, Prenatal