| Outcome | Control (%) (n = 13,752) | Obese* (%) (n = 1473) | Morbidly obese¶ (%) (n = 877) |
| Gestational hypertension | 4.8 | 10.2 | 12.3 |
| Preeclampsia | 2.1 | 3.0 | 6.3 |
| Gestational diabetes | 2.3 | 6.3 | 9.5 |
| Preterm premature rupture of membranes | 1.7 | 2.1 | 2.2 |
| Preterm delivery | 3.3 | 4.0 | 5.5 |
| Fetal growth restriction | 1.1 | 1.0 | 0.8 |
| Birth weight >4000 g | 8.3 | 13.3 | 14.6 |
| Birth weight >4500 g | 1.0 | 2.1 | 2.6 |
| Placenta previa | 0.6 | 0.8 | 0.5 |
| Placental abruption | 0.8 | 0.8 | 0.8 |
| Operative vaginal delivery | 10.5 | 8.5 | 11.1 |
