No abstract available
MeSH terms
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Amniocentesis
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Chorionic Gonadotropin / analysis
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Down Syndrome / blood*
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Estriol / analysis
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Ethics, Medical
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Female
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Genetic Markers*
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Humans
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Maternal Age
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Pregnancy
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Pregnancy Trimester, Second
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Pregnancy, High-Risk
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Risk
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alpha-Fetoproteins / analysis
Substances
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Chorionic Gonadotropin
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Genetic Markers
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alpha-Fetoproteins
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Estriol