| GA at Birth | Number (%) | BW Mean (SD) | PW mean (SD) | PBWR (SD) |
| 37 | 189 (8.97) | 3219 (300) | 601 (87) | 21.15 (1.0) |
| 38 | 850 (40.38) | 3283 (139) | 613 (83) | 19.92 (2.6) |
| 39 | 457 (21.69) | 3481 (240) | 663 (73) | 19.70 (1.4) |
| 40 | 450 (21.37) | 3428 (149) | 684 (39) | 19.96 (1.3) |
| 41 | 144 (6.84) | 3573 (334) | 705 (12) | 20.00 (1.2) |
| 42 | 16 (0.75) | 3613 (336) | 728 (11) | 22.93 (3.5) |