No abstract available
MeSH terms
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Aneuploidy*
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Child, Preschool
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Chromosome Banding
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Chromosome Mapping
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Chromosomes, Human, Pair 18 / genetics*
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Craniofacial Abnormalities / genetics
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Female
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Heterozygote
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Humans
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In Situ Hybridization, Fluorescence
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Isochromosomes / genetics*
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Karyotyping
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Male
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Meiosis / genetics*
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Muscle Hypertonia / genetics
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Nondisjunction, Genetic*
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Polymorphism, Genetic
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Psychomotor Disorders / genetics
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Repetitive Sequences, Nucleic Acid