title: Recurrence risk in de novo 21q21q translocation Down syndrome.
authors.forename: B D
authors.initials: BD
authors.lastname: Hall
mesh_terms: D000328:Adult; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009030:Mosaicism; D012306:Risk; D014178:Translocation, Genetic