Guidelines for Weight Gain During Pregnancy*
Prepregnancy Weight Category | BMI | Total Weight Gain† | Recommended Mean Weight Gain During the Second and Third Trimesters‡ |
|---|---|---|---|
Underweight | < 18.5 | 12.5–18 kg (28–40 lb) | 0.4 kg/week (1 lb/week) |
Normal weight | 18.5–24.9 | 11.5–16 kg (25–35 lb) | 0.4 kg/week (1 lb/week) |
Overweight (0.5–0.7) | 25.0–29.9 | 6.8–11.3 kg (15–25 lb) | 0.27 kg/week (0.6 lb/week) |
Obese (includes all classes) | ≥ 30.0 | 5–9 kg (11–20 lb) | 0.23 kg/week (0.5 lb/week) |
* Recommendations for weight gain are based on prepregnancy BMI. | |||
† For women with a twin pregnancy, provisional recommendations for total weight gain are as follows:
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‡ A weight gain of 0.5–2 kg (1.1–4.4 lb) during the first trimester is assumed. | |||
BMI = body mass index (kg/m2). | |||
Adapted from Rasmussen KM, Yaktine AL, Institute of Medicine (US) and National Research Council (US) Committee to Reexamine IOM Pregnancy Weight Guidelines, eds: Weight Gain During Pregnancy: Reexamining the Guidelines. Washington (DC): National Academies Press (US); 2009 and American College of Obstetricians and Gynecologists: ACOG Committee opinion no. 548: weight gain during pregnancy. Obstet Gynecol. 2013 (reaffirmed 2023);121(1):210-212. doi:10.1097/01.aog.0000425668.87506.4c). | |||