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    A Woman's Journey : Pregnancy : Women's health : Your Changing Body

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    Weight Gain During Pregnancy

    Weight gain during pregnancy varies from woman to woman and depends on body type. Each woman should talk with her healthcare provider about the appropriate amount of weight gain, as well as diet and exercise. 

    2009 recommendations for pregnancy weight gain by BMI (Body Mass Index) from the Institute of Medicine

     

     

    Prepregnancy

    BMI

     BMI  

    Total gain   

    range

    Rate of gain in 2nd and 3rd      

    trimester

    Underweight

     less than 18.5

     28-40 lbs

     1 (1-1.3) lbs/week

    Normal Weight

     18.5-24.9 

     25-35 lbs

     1 (0.8-1) lbs/week

    Overweight

     25.0-29.9

     15-25 lbs

     0.6 (0.5-0.7) lbs/week

    Obese

     greater than 30.0 

     11-20 lbs

     0.5 (0.4-0.6) lbs/week

     

    Total weight gain at the end of pregnancy is, in most instances, approximated as follows, according to the March of Dimes:

    Baby

    7.5 pounds

    Maternal energy stores
    (fat, protein, and other nutrients)

    7 pounds

    Fluid volume

    4 pounds

    Breast enlargement

    2 pounds

    Uterus

    2 pounds

    Amniotic fluid

    2 pounds

    Placenta

    1.5 pounds

    Blood

    3 pounds