Pregnancy Weight Gain

The U.S. Institute of Medicine recommends total gain by pre-pregnancy BMI: underweight 12.5–18 kg, normal weight 11.5–16 kg, overweight 7–11.5 kg, obese 5–9 kg. After the first trimester (about 0.5–2 kg), gain is roughly steady each week. This is general information, not medical advice.