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Table 1 IOM recommendations for total and rate of weight gain in pregnancy

From: The effects of culture on guideline discordant gestational weight gain: a systematic review protocol

Pre-pregnancy BMI Recommended weight gain Rates of weight gain per week in second and third trimester
Range in lb Range in kg Mean (range) in lb/week Mean (range) in kg/week
Underweight <18.5 kg/m 28–40 12.5–18 1 (1–1.3) 0.51 (0.44–0.58)
Normal weight 18.5–24.9 kg/m 25–35 11.5–16 1 (0.8–1) 0.42 (0.35–.50)
Overweight 25.0–29.9 kg/m 15–25 7–11.5 0.6 (0.5–0.7) 0.28 (0.23–0.33)
Obese ≥30.0 kg/m 11–20 5–9 0.5 (0.4–0.6) 0.22 (0.17–0.27)