Grandmaternal age at birth of mothers of children with Down's syndrome (ONGOLISM).
D000293:Adolescent; D000328:Adult; D001315:Australia; D004314:Down Syndrome / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D009030:Mosaicism; D013223:Statistics as Topic; D014314:Trisomy