title: Parental age and birth weight in translocation Down's syndrome.
mesh_terms: D001722:Birth Order; D001724:Birth Weight; D004314:Down Syndrome / Q000453:epidemiology / Q000235:genetics; D005260:Female; D006801:Humans; D007564:Japan; D007621:Karyotyping; D008297:Male; D008423:Maternal Age; D012737:Sex Factors; D013223:Statistics as Topic; D014314:Trisomy