No abstract available
MeSH terms
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Adult
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Chromosomes, Human, Pair 18*
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Female
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Genetic Markers* / physiology
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Genetic Testing / methods
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Humans
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In Situ Hybridization, Fluorescence / methods*
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Inheritance Patterns
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Pregnancy
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Prenatal Diagnosis / methods*
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Trisomy / diagnosis
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Trisomy / genetics