Table 1 Region of Interest (ROI) sizes
Gestational age group | ROI size (mm) | Acceleration score 3 traces (n) | Length of the septum (mm) | ROI length |
|---|---|---|---|---|
GA I (18–24 weeks) | 2 × 2 | 6 | 13 % | |
3 × 2 | 6 | 15.6 ± 2.3 | 19 % | |
4 × 2 | 5 | 26 % | ||
GA II (25–32 weeks) | 2 × 2 | 5 | 9 % | |
3 × 3 | 8 | 23.3 ± 2.6 | 13 % | |
4 × 3 | 10 | 17 % | ||
6 × 3 | 11 | 26 % | ||
GA III (33–41 weeks) | 2 × 2 | 4 | 6 % | |
3 × 3 | 5 | 9 % | ||
4 × 3 | 5 | 12 % | ||
4 × 4 | 7 | 32.5 ± 2.0 | 12 % | |
6 × 3 | 9 | 18 % | ||
6 × 4 | 9 | 18 % | ||
8 × 3 | 11 | 25 % | ||
8 × 4 | 12 | 25 % |