| Gestational age at birth (weeks) | Sex | Total number (%) | Mean birth weight (g) | |
| Male (%) | Female (%) | |||
| 24 | 1 (0.7) | 0 (0.0) | 1 (0.7) | 800 |
| 25 | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 |
| 26 | 1 (0.7) | 3 (2.2) | 4 (2.9) | 950 ± 100 |
| 27 | 4 (2.9) | 0 (0.0) | 4 (2.9) | 1320 ± 192 |
| 28 | 9 (6.5) | 9 (6.5) | 18 (13.0) | 1288 ± 331 |
| 29 | 0 (0.0) | 1 (0.7) | 1 (0.7) | 1400 |
| 30 | 7 (5.1) | 5 (3.6) | 12 (8.7) | 1515 ± 302 |
| 31 | 9 (6.5) | 6 (4.3) | 15 (10.9) | 1606 ± 284 |
| 32 | 11 (8.0) | 12 (8.7) | 23 (16.7) | 1663 ± 296 |
| 33 | 6 (4.3) | 9 (6.5) | 15 (10.9) | 1619 ± 361 |
| 34 | 6 (4.3) | 8 (5.8) | 14 (10.1) | 1886 ± 548 |
| 35 | 5 (3.6) | 6 (4.3) | 11 (8.0) | 1722 ± 342 |
| 36 | 7 (5.1) | 4 (2.9) | 11 (8.0) | 2291 ± 505 |
| Unknown | 5 (3.6) | 4 (2.9) | 9 (6.5) | 1638 ± 288 |
| Total | 71 (51.4) | 67 (48.6) | 138 (100.0) | 1626 ± 448 g |