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. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: Am J Obstet Gynecol. 2017 May 24;217(6):642–651. doi: 10.1016/j.ajog.2017.05.040

Table 1.

2009 Gestational weight gain guidelines (Institute of Medicine, 2009)4

Pre-pregnancy BMI Total weight gain at term Rate of weight gain in the 2nd and 3rd
trimester; Mean (range)

Underweight 12.5–18 kg 0.51 (0.44–0.58) kg/week
(<18.5 kg/m2) 28–40 lbs. 1 (1–1.3) lbs./week

Normal weight 11.5–16 kg 0.42 (0.35–0.50) kg/week
(18.5–24.9 kg/m2) 25–35 lbs. 1 (0.8–1) lbs./week

Overweight 7–11.5 kg 0.28 (0.23–0.33) kg/week
(25.0–29.9 kg/m2) 15–25 lbs. 0.6 (0.5–0.7) lbs./week

Obese 5–9 kg 0.22 (0.17–0.27) kg/week
(≥ 30.0 kg/m2) 11–20 lbs. 0.5 (0.4–0.6) lbs./week

BMI: body mass index