Table 4.
Results of non‐invasive prenatal testing (NIPT) for presence or absence of Y chromosome in 479 twin pregnancies included in Clinical Study B
| Clinical sex | NIPT result | Total | ||
|---|---|---|---|---|
| Presence of Y | Absence of Y | Sex not requested | ||
| XX | 0 | 3 | 0 | 3 |
| XX/XX | 1 | 36 | 2 | 39 |
| XY | 4 | 0 | 0 | 4 |
| XX/XY | 58 | 1 | 2 | 61 |
| XX/XXY | 1 | 0 | 0 | 1 |
| XY/XY | 52 | 0 | 1 | 53 |
| No information | 181 | 82 | 55 | 318 |
| Total | 297 | 122 | 60 | 479 |
| DR: 115/116 (99.1%)* | Spec: 36/37 (97.3%)* | |||
*
Excludes cases with insufficient outcome data to determine detection rate (DR) and specificity (Spec).