Weight gain recommendations for mid- and late pregnancy Institute of Medicine 2009 IOM weight gain recommendations for mid- and late pregnancy: (0.5 – 2 kg weight gain in early pregnancy) Singleton pregnancy? Pre-pregnancy BMI < 18.5 kg / m2 (low weight) - Weight gain during pregnancy 12.5 - 18.0 kg, 0.51 (0.44-0.58) kg/W?Pre-pregnancy BMI 18.5 - 24.9 kg / m2 (normal weight) - -11.5 - 16.0 kg of weight gain during pregnancy, 0.42 (0.35-0.50) kg/W?Pre-pregnancy BMI 25.0-29.9 kg / m2 (overweight) -7.0 - 11.5 kg of weight gain during pregnancy, 0.28 (0.23- Pre-pregnancy BMI ≥ 30.0 kg/m2 (obese) - Weight gain during pregnancy 5-9.0 kg, 0.22 (0.17-0.27) kg/W Obese class I - BMI 30 - 34.9 kg/m2 Obesity class II - BMI 35 -39.9 kg/m2 Obesity class III - BMI ≥ 40 kg/m2 (also called severe, extreme, or massive obesity) Twin pregnancy? Pre-pregnancy BMI < 18.5 kg/m2 (low weight) - no recommendation, due to insufficient data? Pre-pregnancy BMI 18.5 - 24.9 kg / m2 (normal weight) - weight gain during pregnancy 16.8 - 24.5 kg? Pre-pregnancy BMI 25.0 - 29.9 kg / m2 (overweight) - weight gain of 14.1 - 22.7 kg during pregnancy? Pre-pregnancy BMI ≥ 30.0 kg/m2 (obese) - weight gain during pregnancy 11.4 - 19.1 kg In order to control the weight gain during pregnancy, the following dietary recommendations are made: vegetables can be eaten freely, as much as you want to eat. About 500g a day. Fruits: not as a meal, 200~400g a day. fruit juice is not recommended. Protein class: 80 ~ 90g a day carbohydrates: moderate, keep weight gain in the normal range. The amount of salt should not be more than 5 ~ 6g to eat as little as possible or do not eat candy, snacks, sweet drinks, fried foods and high-fat foods.