No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Anticoagulants / therapeutic use*
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Blood Specimen Collection / methods*
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Chromosome Disorders / diagnosis*
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Chromosomes, Human, Pair 13
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Chromosomes, Human, Pair 18
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Cytosine
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DNA / blood*
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Diagnostic Errors / prevention & control*
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Down Syndrome / diagnosis*
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False Positive Reactions
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Female
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Guanosine
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Heparin, Low-Molecular-Weight / therapeutic use*
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Humans
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Plasma
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Pregnancy
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Prenatal Diagnosis
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Time Factors
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Trisomy / diagnosis*
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Trisomy 13 Syndrome
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Trisomy 18 Syndrome
Substances
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Anticoagulants
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Heparin, Low-Molecular-Weight
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Guanosine
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Cytosine
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DNA