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Clinical recommendations for cumulative gestational weight gain by pre-pregnancy BMI for mothers of singletons and twins at gestational ages 37–42 weeks (IOM, 2009)
| Prepregnancy BMI | Recommended range of Cumulative weight gain (lbs) |
|
|---|---|---|
| Singleton | Twins | |
| Underweight (<18.5 kg/m2) | 28–40 | – |
| Normal (18.5–24.9 kg/m2) | 25–35 | 37–54 |
| Overweight (25.0–29.9 kg/m2) | 15–25 | 31–50 |
| Obese (≥30.0 kg/m2) | 11–20 | 24–42 |
