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The incidence of sex chromosome aneuploidy (SCA) at livebirth in a cohort of newborns in Denmark. (data from Nielsen, 1991 and Berglund, 2020)
| Type of SCA | Incidence at livebirth | Clinical diagnosis during lifetime |
|---|---|---|
| 47,XXY and mosaicism | 1.73 per 1,000 | 23% |
| 47,XYY | 1.18 per 1,000 | NA |
| 47,XXX | 1.06 per 1,000 | 7% |
| 45,X | 0.53 per 1,000 | 70% |
| Other SCA | 0.09 per 1,000 | NA |
