| Males N = 35,749 | Females N = 34,087 |
---|---|---|
Birth weight (g) | 3525 ± 521 | 3393 ± 490*** |
Placental weight (g) | 685 ± 141 | 671 ± 138*** |
Birth weight categories | ||
 SGA (%) | 8.4 | 8.3 |
 AGA (%) | 79.6 | 80.1 |
 LGA (%) | 12.0 | 11.6 |
Anesthetic use | Â | ** |
 Regional (%) | 74.5 | 73.7 |
 General (%) | 2.2 | 2.0 |
 None/Other (%) | 23.3 | 24.3 |
Delivery type | Â | ** |
 Vaginal (%) | 81.1 | 82.8 |
 Labor CS (%) | 12.8 | 10.5 |
 Elective CS (%) | 6.2 | 6.7 |
NRFHR for CS (%) | 3.2 | 2.3** |
Umbilical artery pH | 7.247 ± 0.063 | 7.249 ± 0.063** |
Umbilical artery pH < 7.1 (%) | 2.2 | 2.1 |