No abstract available
MeSH terms
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Algorithms
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Biomarkers / blood
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Chorionic Gonadotropin, beta Subunit, Human / blood*
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Decision Trees
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Down Syndrome / blood*
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Down Syndrome / diagnosis*
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Down Syndrome / etiology
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Estriol / blood*
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Female
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Gestational Age
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Humans
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Mass Screening / methods*
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Maternal Age
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Patient Selection
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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*
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Reproducibility of Results
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Risk Factors
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Sensitivity and Specificity
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Ultrasonography, Prenatal / methods*
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alpha-Fetoproteins / metabolism*
Substances
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Biomarkers
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Chorionic Gonadotropin, beta Subunit, Human
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alpha-Fetoproteins
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Pregnancy-Associated Plasma Protein-A
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Estriol