Chromosome Aberrations in 2159 Consecutive Newborn Babies

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Abstract
Preliminary results of chromosome studies on cultured umbilical-cord-blood leukocytes from a consecutive series of 2159 infants born during a year indicated that gross chromosome abnormalities were present in 0.48 per cent (cultures were successful in 1066 males and 1015 females, representing 96.3 per cent ascertainment). These included four infants with XYY, one with XXY and one with D/D translocation trisomy (all male), as well as two with regular trisomy 21, one with D/D balanced translocation and one with cri du chat (all female).