Foot Size

Your belly isn't the only part of your body that expands when you're pregnant. Your feet also expand, often a half or even a full shoe size. First, your feet and ankles may swell due to the increase in blood and fluids in your body that support your growing baby. Second, the pregnancy hormone relaxin loosens the ligaments and muscles in your body to allow pelvic joints to open up in preparation for childbirth. But the effects of relaxin are not limited to the pelvis. Joints throughout your body loosen, including those in your feet. As a result, bones in your feet may spread, increasing your shoe size.

Call Doctor If:

  • Swelling is more than mild or you have a sudden increase in swelling.

Step-by-Step Care:

  • Soak your feet in cool water.
  • Prop your feet up on a pillow.
  • Buy comfortable, low-heeled shoes to accommodate your new foot size.
  • Keep moving. Exercise your legs to keep fluid from building up.
WebMD Medical Reference Reviewed by Traci C. Johnson, MD on January 15, 2019

Sources

SOURCES:

The American College of Obstetricians and Gynecologists: "Your Pregnancy and Childbirth, Month to Month."

U.S. National Library of Medicine: "Foot, Leg, and Ankle swelling."

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