Nutrition During Pregnancy

Weight Gain

Weight gain recommendations during pregnancy are based on your pre-pregnant weight.  Studies done on weight gain in pregnancy and outcomes have been used to come up with these guidelines.

The healthiest outcomes for you and your baby occur when your weight gain during pregnancy fall within these ranges. (1)  Keep in mind that starting your pregnancy above a healthy weight carries greater health risks for both you and your baby.  This is based on your body mass index (BMI). (2) (3)

You can find your BMI, by typing “BMI Calculator” into the browser of your computer and filling in the information.  Be sure to use your weight BEFORE you got pregnant to do this calculation.

Your BMI results will help you to know the amount of weight you are encouraged to gain during your pregnancy.  Again, these have been found to be the weight gains where you and your baby have the greatest health benefits.  Granted, healthy babies are born to women who gain outside of these ranges, but women who gained weight within these guidelines experienced better pregnancy outcomes, than those that didn’t fall within the weight ranges. (2)  Remember if you reach the high end of the weight recommendation you should not try to lose weight.  Talk to your healthcare provider if you have questions about your weight gain.

Single Pregnancies           Recommended Weight Gain in Pregnancy

  BMI less than 18.5                        28-40 pounds (approx. 16-18 kilograms)

  BMI 18.5-24.9                               15-35 pounds (approx. 11-16 kilograms)

  BMI 25.0-29.9                              15-25 pounds (approx. 7-11 kilograms)

  BMI of 30.0 or greater                11-20 pounds (approx. 5-9 kilograms)

Note: Twins and multiple pregnancies check with your healthcare provider for the amount of weight gain desired.



  1. Position of the American Dietetic Association & American Society for Nutrition: Obesity, Reproduction and Pregnancy Outcomes, J Am Diet Assoc. 2009, 109: 918-27.
  2. Institute of Medicine of the National Academies, Weight Gain During Pregnancy: Reexamining the Guidelines, Resource Sheet, May 2009.
  3. Pregnancy Week by Week Available at  Accessed June 5, 2015.