No abstract available
MeSH terms
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Amniotic Fluid / analysis*
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Down Syndrome / diagnosis
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Down Syndrome / genetics*
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Female
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Humans
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Pregnancy
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Pregnancy Trimester, Second
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Prenatal Diagnosis
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Serum Albumin / analysis*
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alpha-Fetoproteins / analysis*
Substances
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Serum Albumin
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alpha-Fetoproteins