Table 3. Number of all births at 23–41 weeks of gestation based on obstetric estimates (OEs) for the three categories of intrauterine growth stage for the 4,594,570 such births in California from 2007 to 2016, with the row wise percentage of such infants in parenthesis.
| BMI category | SGA | AGA | LGA |
|---|---|---|---|
| Underweight, <18.5 | 17,738 (9.6) | 161,820 (87.9) | 4,621 (2.5) |
| Normal, 18.5–24.9 | 131,843 (5.9) | 2,003,161 (89.1) | 112,529 (5.0) |
| Overweight, 25.0–29.9 | 55,724 (4.7) | 1,039,682 (87.2) | 96,989 (8.1) |
| Obese I,II,III ≥ 30.0 | 40,451 (4.2) | 813,343 (83.8) | 116,669 (12.0) |
| Obese I, 30.0–34.9 | 25,365 (4.3) | 499,934 (85.0) | 62,889 (10.7) |
| Obese II, 35.0–39.9 | 9,825 (4.0) | 203,183 (82.8) | 32,477 (13.2) |
| Obese III, ≥ 40 | 5,261 (3.9) | 110,226 (80.6) | 21,303 (15.6) |
| Total | 245,756 (5.4) | 4,018,006 (87.5) | 330,808 (7.2) |
Preterm: < 37 weeks of gestation; Term: ≥37 weeks of gestation; SGA small-for-gestational-age, AGA appropriate-for-gestational-age, LGA large-for-gestational-age, LBW Low birth weight (< 2500 g)