No abstract available
Publication types
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Multicenter Study
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Research Support, Non-U.S. Gov't
MeSH terms
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Chromosome Disorders / diagnosis*
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Chromosome Disorders / diagnostic imaging
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Chromosome Disorders / genetics
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Female
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Hong Kong
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Humans
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Karyotyping
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Nuchal Translucency Measurement
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Pregnancy
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Pregnancy Trimester, First
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Prospective Studies
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Ultrasonography, Prenatal*