Table 1 Institute of Medicine weight gain recommendations for pregnancy by BMI category [1]
Pre-pregnancy body mass index | Body mass index (kg/m2) | Recommended range of total weight (kg) | Recommended rates of weight gain a in the second and third trimesters (kg) (mean range [kg/week]) |
|---|---|---|---|
Underweight | < 18.5 | 12.5–18 | 0.51 (0.44–0.58) |
Normal weight | 18.5–24.9 | 11.5–16 | 0.42 (0.35–0.50) |
Overweight | 25–29.9 | 7–11.5 | 0.28 (0.23–0.33) |
Obese (includes all classes) | ≥ 30 | 5–9 | 0.22 (0.17–0.27) |