A cytogenetic survey of 14,069 newborn infants. IV. Further follow-up on the children with sex chromosome anomalies.

Between 1970 and 1973, 14,069 consecutive liveborn infants at the Women's Centre, Winnipeg, were subjected to karyotypic analysis. The details of the materials and methods and the preliminary findings of the study have been previously published [1,2]. A total of 15 nonmosaic and 4 mosaic infants with sex chromosome anomalies were detected: 12 males and 7 females. These children have been followed wherever possible by physical and developmental evaluations, and preliminary findings have been reported previously [3]. In order to obtain further baseline data on these children while they were still prepubertal, it was decided to recontact all families and encourage them to present their children for further physical evaluation and psychologic testing. Details of these investigations and their results are given in this paper.