THE 17-18 TRISOMY AND 21 TRISOMY SYNDROMES IN SIBLINGS.
D002887:Chromosomes, Human, Pair 18; D004314:Down Syndrome; D005826:Genetics, Medical; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases; D035781:Siblings; D014314:Trisomy
GENETICS, HUMAN; INFANT; INFANT, NEWBORN; INFANT, NEWBORN, DISEASES; MONGOLISM; TRISOMY