Table 2.
2009 Institute of Medicine Recommendations for Total and Rate of Weight Gain during Pregnancy, by Pre-pregnancy BMI
| Pre-pregnancy BMI | BMI, kg/m2 | Total Weight Gain Range in lbs |
Rates of Weight Gaina 2nd and 3rd Trimester Mean (Range) in 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 (0.5–0.7) |
| Obese (includes all classes) |
≥30 | 11–20 | 0.5 (0.4–0.6) |
a
Calculations assume a 1.1–4.4 lbs weight gain in the first trimester.