Prepregnancy body mass index (kg per m2)	Category	Recommended weight gain
< 18.5	Underweight	28 to 40 lb (12.7 to 18.1 kg)
18.5 to 24.9	Normal weight	25 to 35 lb (11.3 to 15.9 kg)
25.0 to 29.9	Overweight	15 to 25 lb (6.8 to 11.3 kg)
≥ 30	Obese	11 to 20 lb (5.0 to 9.1 kg)