<prompt> What is the normal weight gain during pregnancy?1 to 3 kg5 to 7 kg10 to 12 kg12 to 15 kg  <response>: The total weight gain during the course of a singleton pregnancy for a healthy woman averages 11 kg 24 lb. This has been distributed to 1 kg in 1st trimester and 5 kg each in second and third trimester. Gestational weight gain recommendations are based on a womans pre-pregnancy body mass index BMI. BMI 18.5 Underweight: - Mean rate of weight gain in the 2nd and 3rd trimester 0.5 kgweek; Recommended range of total weight gain 12.5 - 18 kg. BMI 18.5 - 24.9 Normal weight: - Mean rate of weight gain in the 2nd and 3rd trimester 0.4 kgweek; Recommended range of total weight gain 11.5 - 16 kg. BMI 25.0 - 29.9 Overweight: - Mean rate of weight gain in the 2nd and 3rd trimester 0.3 kg; Recommended range of total weight gain 7 - 11.5 kg. BMI 30 Obese: - Mean rate of weight gain in the 2nd and 3rd trimester 0.2 kgweek; Recommended range of total weight gain 5 - 9kg. 