Health Encyclopedia


Document Search by P01243

Weight Gain During PregnancyAumento de Peso durante el Embarazo

Weight Gain During Pregnancy

Weight gain during pregnancy varies from woman to woman and depends on body type. Each woman should talk with her care 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






Total gain   


Rate of gain in 2nd and 3rd      



 less than 18.5

 28-40 lbs

 1 (1-1.3) lbs/week

Normal Weight


 25-35 lbs

 1 (0.8-1) lbs/week



 15-25 lbs

 0.6 (0.5-0.7) lbs/week


 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:


7.5 pounds

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

7 pounds

Fluid volume

4 pounds

Breast enlargement

2 pounds


2 pounds

Amniotic fluid

2 pounds


1.5 pounds


3 pounds

Related Items
Wellness Library
  Healthy Strategies for Weight Loss
  In Midlife, Keep Your Weight Under Control
  Could Medication Be Causing Weight Gain?
Success Stories
  Lynn Brown, Age 50: She Avoided Sugars and Starches
Daily News Feed
  Skipping Breakfast a Recipe for Heart Disease, Study Finds
  Skipping Breakfast May Not Lead to Weight Gain After All
  Nicotine Addiction Level May Predict Weight Gain in Ex-Smokers
  Obesity Gene Tests May Not Hamper Weight-Loss Efforts
  President Taft's Obesity Struggle Was a Harbinger of Things to Come
  More Weight Gain in Pregnancy Tied to Higher Autism Risk for Kids: Study
  Could Good Manners Help Spur Holiday Weight Gain?
  Exercise May Not Stave Off Holiday Weight Gain
  Working Out May Help Counteract Holiday Eating
  As Body Weight Rises, So Do Health Costs, Study Finds
  Media Focus on Obesity May Backfire for Some Women
  Early Signs That High-Calorie Diet May Help With Lou Gehrig's Disease
  Weight Gain From Antidepressants Is Minimal, Study Suggests
Adult Diseases and Conditions
  Watch Your Weight
Pediatric Diseases and Conditions
  Weight Management and Adolescents