Chromosomal abnormality | No of cases (%) |
Duplication Ph | 19 (23%) |
Trisomy 8 | 14 (17%) |
Trisomy 19 | 8 (10%) |
Trisomy 21 | 6 (7%) |
Abn (17) | 2 (2.4%) |
del(7q) | 1 (1.2%) |