No abstract available
MeSH terms
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Academic Medical Centers
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Adult
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Aneuploidy*
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Chromosome Disorders / diagnosis*
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Chromosome Disorders / epidemiology*
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Female
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Genetic Testing*
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Humans
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Minnesota / epidemiology
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Pregnancy
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Pregnancy Trimester, First
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Pregnancy Trimester, Second
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Prenatal Diagnosis / methods*
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Retrospective Studies
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Ultrasonography, Prenatal