. Author manuscript; available in PMC: 2019 Aug 13.

Published in final edited form as: Lancet Diabetes Endocrinol. 2016 Oct 12;4(12):1037–1049. doi: 10.1016/S2213-8587(16)30278-9

Table 3:

US Institute of Medicine recommendations for gestational weight gain depending on the before pregnancy BMI

	BMI (kg/m²;WHO criteria)	Range of total weight gain (kg)	Rates of weight gain^* in second and third trimesters (mean [range] in kg per week)
Underweight	<18.5	12.7–18.1	0.45 (0.45–0.59)
Normal weight	18.5–24.9	11.3–15.9	0.45 (0.36–0.45)
Overweight	25.0–29.9	6.8–11.3	0.27 (0.23–0.32)
Obese (includes all classes)	≥30.0	5.0–9.1	0.23 (0.18–0.27)

These calculations assume a weight gain of 0.5–2.0 kg in the first trimester.