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Table 1 2009 Institute of Medicine recommendations for weight gain during pregnancy

From: Patient-provider communication about gestational weight gain among nulliparous women: a qualitative study of the views of obstetricians and first-time pregnant women

Pre-pregnancy BMI Total weight gain: Rate of weight gain, 2ndand 3rdtrimester
  Range in kg Range in lbs Mean (Range) kg/week Mean (Range) lbs/week
Underweight (< 18.5 kg/m2) 12.5-18 28-40 0.51 (0.44-0.58) 1 (1–1.3)
Normal weight (18.5-24.9 kg/m2) 11.5-16 25-35 0.42 (0.35-0.50) 1 (0.8-1)
Overweight (25.0-29.9 kg/m2) 7-11.5 15-25 0.28 (0.23-0.33) 0.6 (0.5-0.7)
Obese (≥ 30.0 kg/m2) 5-9 11-20 0.22 (0.17-0.27) 0.5 (0.4-0.6)
  1. Source: Institute of Medicine and National Research Council of the National Academies [5].