Cytogenetic (GTG-banded) Abnormality | Spectral Karyotype Findings | ||
---|---|---|---|
 | Positive, n | Inconclusive, n | Approximate Sensitivity, % |
Supernumerary Marker | Â | Â | Â |
   Prenatal (n = 13) | 10 | 3 | 77 |
   Postnatal (n = 62) | 48 | 14 | 77 |
Additonal genetic material | Â | Â | Â |
   Prenatal (n = 6) | 5 | 1 | 83 |
   Postnatal (n = 65) | 63 | 2 | 97 |
Ring chromosome | Â | Â | Â |
   Prenatal (n = 4) | 4 | 0 | 100 |
   Postnatal (n = 9) | 9 | 0 | 100 |
Complex rearrangements | Â | Â | Â |
   Prenatal (n = 8) | 7 | 1 | 88 |
   Postnatal (n = 12) | 12 | 0 | 100 |
======================== | ======== | ========== | ========= |
Total | Â | Â | Â |
   Prenatal (N = 31) | 26 | 5 | 84 |
   Postnatal (N = 148) | 132 | 16 | 89 |