|  | Cases with abnormal array CGH analysisa | Total (N) | Detection rate (%) | ||
---|---|---|---|---|---|---|
 |  | Aneuploidy (N) | Deletion (N) | Duplication (N) |  |  |
Prenatal casesb (N = 4073) | Â | 60 | 7 | 8 | 75 | 1.8 |
Postnatal cases (N = 1007) | PB with clinical indicationsc (N = 407) | 5 | 19 | 10 | 34 | 8.3 |
 | CB (N = 600) | 0 | 4 | 1 | 5 | 0.83 |
Total | 5080 | 65 | 30 | 19 | 114 | 2.24 |