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Maternal age and risk for trisomy 21 assessed by the origin of chromosome nondisjunction: a report from the Atlanta and National Down Syndrome Projects

Down SyndromeCytogeneticsMaternal AgeGenetic DisorderGenetic EpidemiologyPediatricsGynecologyMaternal HealthReproductive HealthAneuploidyTrisomy 21Chromosome NondisjunctionPublic HealthDefectsMedicineChromosome 22