Table 1.
2009 Institute of Medicine recommendations for total and rate of weight gain during pregnancy, by pre-pregnancy BMI
| Pre-pregnancy BMIa | BMI (kg/m2) | Total weight gain range (lbs) |
Rates of weight gain 2nd and 3rd Trimester (mean range lbs/week) |
|---|---|---|---|
| Underweight | <18.5 | 28–40 | 1 (1–1.3) |
| Normal weight | 18.5–24.9 | 25–35 | 1 (0.8–1) |
| Overweight | 25.0–29.9 | 15–25 | 0.6 (0.5–07) |
| Obese (includes all classes) | ≥30.0 | 11–20 | 0.5 (0.4–0.6) |
a
Recommendations for weight gain differ by pre-pregnancy BMI to increase the percentage of women who have appropriate for gestational age (2.5–4.0 kg) infants [5]