No abstract available
MeSH terms
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Abortion, Therapeutic
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Amniocentesis / adverse effects
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Amniocentesis / methods
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Amniocentesis / standards*
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Amniotic Fluid / chemistry
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Congenital Abnormalities / diagnosis*
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Congenital Abnormalities / epidemiology
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Evaluation Studies as Topic
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Female
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Humans
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Karyotyping
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Maternal Age
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Pregnancy
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Pregnancy Trimester, First*
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Sensitivity and Specificity
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alpha-Fetoproteins / chemistry