title: Down syndrome: current stage of cytogenetic epidemiology.
mesh_terms: D000328:Adult; D004314:Down Syndrome / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D008875:Middle Aged; D010331:Paternal Age; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012306:Risk; D012744:Sex Ratio; D014178:Translocation, Genetic