Alternative definition : NICHD: In a woman with a normal weight pre-pregnancy body mass index (BMI), i.e. 18.5-24.9,
the weight gained during pregnancy does not exceed a total weight gain of 25 lbs.
In a woman with an underweight pre-pregnancy body mass index (BMI), i.e. less than
18.5, the weight gained during pregnancy does not exceed a total weight gain of 28
lbs. In a woman with an overweight pre-pregnancy body mass index (BMI), i.e. 25.0-29.9,
the weight gained during pregnancy does not exceed a total weight gain of 15 lbs.
In a woman with an obese pre-pregnancy body mass index (BMI), i.e. greater than 30,
the weight gained during pregnancy does not exceed a total weight gain of 11 lbs.
These standards are supported for the whole population irrespective of height, race
or ethnicity.;