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Sex chromosome positive results of NIPT.
| Fetal karyotype | Detected positive No., n | No. of amniocentesis,n | No. of true positive, n | No. of false positive, n |
| Monosomy X | 41 | 38 | 11 | 27 |
| XXX | 11 | 11 | 4 | 7 |
| XYY | 10 | 7 | 4 | 3 |
| XXY | 17 | 16 | 6 | 10 |
| Mosaic sex chromosome aneuploidies | 12 | 6 | 5 | 1 |
| Total | 91 | 78 | 30 | 48 |
