Where does all the weight gain go during pregnancy?

Now that you’re pregnant, your body is changing to get ready for your baby. Gaining weight is an important part of pregnancy.

If you gain too little or too much weight during pregnancy, you’re more likely than other women to have certain complications such as a premature birth (before 37 weeks of pregnancy).

You may be wondering – where does all the weight go? If you’re at a healthy weight before pregnancy and gain 30 pounds during pregnancy, here’s where you carry the weight:

pregnant woman on scale

  • Baby = 7.5 pounds
  • Amniotic fluid = 2 pounds. Amniotic fluid surrounds the baby in the womb.
  • Blood = 4 pounds
  • Body fluids = 4 pounds
  • Breasts = 2 pounds
  • Fat, protein and other nutrients = 7 pounds
  • Placenta = 1.5 pounds. The placenta grows in your uterus (also called womb) and supplies the baby with food and oxygen through the umbilical cord.
  • Uterus = 2 pounds. The uterus is the place inside you where your baby grows

Gaining weight slowly and steadily is best. You may not gain any weight in the first trimester, or you may gain a little more or a little less than you think you should in any week. Try not to worry about it.

Gaining weight is necessary for your pregnancy, but gaining the right amount is also important. Talk to your prenatal care provider about the weight gain that is best for you and your body.

Have questions? Text or email AskUs@marchofdimes.org.

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