Pregnant and Measuring Big or Small?

What does it mean if I'm measuring too small or too big at the doctor's office?
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ByThe Bump Editors
Updated
Mar 2017
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In general, after 20 weeks, your fundal height (the distance from your pubic bone to the top of your uterus) should pretty much equal the number of weeks you’ve been pregnant. So, if you start measuring more than two centimeters off in either direction, your OB will probably schedule you for an ultrasound to check things out.

Possible reasons for measuring large:

  • You simply have a big, healthy baby
  • Your due date was wrong
  • You’re carrying twins or more
  • You have too much amniotic fluid
  • Baby is especially high in the uterus
  • You have gestational diabetes (which can lead to bigger babies)

Possible reasons for measuring small:

  • You have a small baby
  • Your due date was wrong
  • There could be an intrauterine growth restriction which is when baby is below the tenth percentile for its age; it could be due to many reasons: placenta problems, heart disease in the mother, even high altitudes
  • You have too little amniotic fluid

Plus, more from The Bump:

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