| Sex N (%) |
| ||||
| GA in weeks | F. | M | Total | ||
| 21 | 1 (100.0) | 0 (0.0) | 1 (100.0) | ||
| 24 | 1 (33.3) | 2 (66.7) | 3 (100.0) | ||
| 27 | 6 (75.0) | 2 (25.0) | 8 (100.0) | ||
| 28 | 2 (40.0) | 3 (60.0) | 5 (100.0) | ||
| 29 | 3 (60.0) | 2 (40.0) | 5 (100.0) | ||
| 30 | 5 (38.5) | 8 (61.5) | 13 (100.0) | ||
| 31 | 6 (31.6) | 13 (68.4) | 19 (100.0) | ||
| 32 | 3 (75.0) | 1 (25.0) | 4 (100.0) | ||
| 33 | 2 (50.0) | 2 (50.0) | 4 (100.0) | ||
| 34 | 6 (46.2) | 7 (53.8) | 13 (100.0) | ||
| 35 | 7 (53.8) | 6 (46.2) | 13 (100.0) | ||
| 36 | 6 (71.4) | 2 (28.6) | 8 (100.0) | ||
| Total | 47 (49.5) | 48 (50.5) | 95 (100.0) | ||