From: Non-invasive prenatal test to screen common trisomies in twin pregnancies
Results of screening tests | Maternal age (years) | Gestational age | Conception | Nuchal translucency | Fetal fraction (%) | Maternal weight (Kg) | NIPT Result | Karyotyping | |
---|---|---|---|---|---|---|---|---|---|
Case 1 | T21 (QUAD test): 1/723 & 1/89 | 35 | 16w + 2d | Spontaneous | 1.04 mm & 2.2 mm | 9 | 63 | T21 High Risk | 47,XX,+ 21, 47,XX,+ 21 |
Case 2 | T21 (FTS): 1/2049 & 1/576 | 45 | 15w + 1d | Spontaneous | 2.3 mm & 2.1 mm | 8 | 61 | T13 High Risk | 47,XX,+ 13, 46,XX |
Case 3 | T21 (Sequential): 1/1423 & 1/611 T21 (FTS): 1/6300 & 1/2021 | 32 | 12w + 6d | IVF-ICSI | 1.2 mm & 1.9 mm | 5 | 73 | T18 High Risk | 47,XX,+ 18, 46,XX |
Case 4 | T21 (FTS): 1/78 & 1/125 T13 (FTS): 1/330 & 1/723 | 32 | 13w + 2d | Spontaneous | 3.01 mm & 2.8 mm | 7 | 65 | T21 High Risk | 47,XX,+ 21, 46,XX |
Case 5 | T21 (FTS): 1/1821 & 1/897 T18 (FTS): 1/898 & 1/1002 | 41 | 12w + 2d | IVF-ICSI | 1.3 mm & 1.5 mm | 4 | 77 | Low risk | 47,XX,+ 18, 46,XX |
Case 6 | T21 (FTS): 1/969 & 1/103 | 36 | 21w + 3d | Spontaneous | 1.7 mm & 2.5 mm | 10 | 52 | T21 High Risk | Unknown |