Table 3 Mean and range of early gestational weight gain by pre-pregnancy BMI and the IOM weight gain recommendations [mean (range) in kg] based on self-reported pre-pregnancy BMI
|  | Underweight (<18.5 kg/m2) n = 125 | Normal weight (BMI 18.5–24.9 kg/m2) n = 1209 | Overweight (BMI 25.0–29.9 kg/m2) n = 418 | Obese (BMI ≥ 30 kg/m2) n = 229 |
|---|---|---|---|---|
IOM weekly weight gain recommendation (kg) | 0.51 (0.44–0.58) | 0.42 (0.35–0.50) | 0.28 (0.23–0.33) | 0.22 (0.17–0.27) |
Weekly weight gain (kg) | 0.41 (−1.00–2.60) | 0.38 (−2.00–10.00) | 0.45 (−8.00–8.00) | 0.46 (−2.00–6.33) |