title: A survey of 972 cytogenetically examined cases of Down's syndrome.
mesh_terms: D000328:Adult; D000782:Aneuploidy; D002675:Child, Preschool; D002869:Chromosome Aberrations; D004314:Down Syndrome / Q000150:complications / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000150:complications; D008297:Male; D008423:Maternal Age; D008875:Middle Aged; D009030:Mosaicism; D009520:New Zealand