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Table 1 National Academies’ recommendations for gestational weight gain in pregnancy [8]

From: ‘Weighty issues’ in GP-led antenatal care: a qualitative study

Pre-pregnancy (BMI) Recommended weight gain (kg) Rate of weight gain in second and third trimesters kg/weeka
Underweight BMI < 18.5 kg/m2 12.5–18.0 0.5
Healthy weight BMI 18.5–24.9 kg/m2 11.5–16.0 0.4
Overweight BMI 25–29.9 kg/m2 7.0–11.5 0.3
Obeseb BMI > 30 kg/m2 5.0–9.0 0.3
  1. BMI Body Mass Index
  2. Twins: Women of a healthy weight should gain 16.8–24.5 kg, overweight 14.1–22.7 kg, and obese 11.3–19.1 kg. There are no recommendations for triplets.
  3. aAssuming 1-2 kg weight gain in 1st trimester
  4. bThe IOM gestational weight gain guidelines does not make any specific recommendations for women with Class II or Class III obesity