Table 5.
Weekly weight gain in the third trimester by BMI class for all term singleton births and for births without complications
| IOM Recommendations (lb) | N | Mean weekly GWG ± SEM in the third trimester (lb/week) | Proportion above IOM recommendations | |
|---|---|---|---|---|
| All births | 12,912 | 1.06 ± 0.01 | 64.5% | |
| Underweight | 1–1.3 | 371 | 1.05 ± 0.03 | 28.6% |
| Normal weight | 0.8–1.0 | 5085 | 1.12 ± 0.01 | 56.8% |
| Overweight | 0.5–0.7 | 3230 | 1.12 ± 0.01 | 75.9% |
| Obese class I | 0.4–0.6 | 2028 | 0.98 ± 0.02 | 71.8% |
| Obese class II | 0.4–0.6 | 1230 | 0.89 ± 0.02 | 65.0% |
| Obese class III | 0.4–0.6 | 968 | 0.90 ± 0.03 | 64.4% |
| Births with no complications | 6473 | 1.11 ± 0.01 | 65.3% | |
| Underweight | 1–1.3 | 220 | 1.03 ± 0.03 | 25.9% |
| Normal weight | 0.8–1.0 | 3098 | 1.14 ± 0.01 | 58.0% |
| Overweight | 0.5–0.7 | 1666 | 1.17 ± 0.02 | 79.6% |
| Obese class I | 0.4–0.6 | 837 | 1.04 ± 0.03 | 74.3% |
| Obese class II | 0.4–0.6 | 420 | 0.87 ± 0.03 | 65.5% |
| Obese class III | 0.4–0.6 | 232 | 0.96 ± 0.09 | 63.8% |