Frequency and occurrence of chromosomal syndromes. I. D-Trisomy.
D001722:Birth Order; D002869:Chromosome Aberrations / Q000453:epidemiology*; D025063:Chromosome Disorders; D000013:Congenital Abnormalities / Q000453:epidemiology*; D005260:Female; D005313:Fetal Death; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D008423:Maternal Age; D009864:Ontario; D011247:Pregnancy; D014314:Trisomy / Q000453:epidemiology*