No abstract available
Publication types
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Editorial
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Research Support, Non-U.S. Gov't
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Comment
MeSH terms
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Chromosomes, Human, Pair 18 / genetics*
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DNA / blood*
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DNA / genetics*
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Down Syndrome / diagnosis*
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Female
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Humans
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Male
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Pregnancy
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Pregnancy Trimester, First / blood*
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Prenatal Diagnosis / methods*
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Trisomy / diagnosis*
Supplementary concepts
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Chromosome 18, trisomy 18p
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Chromosome 18, trisomy 18q