Recommended Weight Gain in Pregnancy Healthy weight gain supports a healthy mother and baby. Pregnancy weight gain depends on pre pregnancy BMI. Gaining too little or too much weight can affect pregnancy outcomes. Underweight BMI less than 18.5 Total weight gain 28 to 40 lb Normal weight BMI 18.5 to 24.9 Total weight gain 25 to 35 lb Overweight BMI 25 to 29.9 Total weight gain 15 to 25 lb Obese BMI 30 or more Total weight gain 11 to 20 lb Most weight gain occurs in the second and third trimesters and should be gradual and well monitored. This is not about eating for two but eating right. Each pregnancy is unique. Follow a personalised plan under medical guidance. Dr Kavita Gadekar Obstetrician and Gynaecologist