title: Trisomy 18 and 21 in two siblings.
mesh_terms: D000293:Adolescent; D000328:Adult; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002902:Chromosomes, Human, 16-18; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D005313:Fetal Death; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D010375:Pedigree; D011247:Pregnancy; D014314:Trisomy