No abstract available
MeSH terms
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Adult
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Aneuploidy
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Chorionic Gonadotropin / blood
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Chromosome Disorders / diagnosis*
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Down Syndrome / diagnostic imaging*
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Female
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Genetic Testing*
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Humans
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Nuchal Translucency Measurement
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Practice Guidelines as Topic
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Pregnancy
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Pregnancy-Associated Plasma Protein-A / analysis
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Prenatal Diagnosis*
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Risk
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Ultrasonography, Prenatal
Substances
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Chorionic Gonadotropin
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Pregnancy-Associated Plasma Protein-A