Summary
Follow-up examination of 15 unselected children with aneuploid sex chromosome abnormalities has been made till between the age of 21/2 and 5 years. The mental development of the 15 children was in all cases within the normal range, but there was a tendency to some differences compared with their siblings.
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Nielsen, J., Sillesen, I. Follow-up till age 3–4 of unselected children with sex chromosome abnormalities. Hum Genet 33, 241–257 (1976). https://doi.org/10.1007/BF00286848
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DOI: https://doi.org/10.1007/BF00286848