Supernumerary chromosomes (trisomies) and maternal age.
D000293:Adolescent; D000328:Adult; D002869:Chromosome Aberrations / Q000453:epidemiology*; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D008875:Middle Aged; D011247:Pregnancy; D014314:Trisomy / Q000453:epidemiology*