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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)