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Q&A: Nonstress test during pregnancy?

I'm scheduled for a nonstress test soon... what should I expect? And what exactly is my doctor looking for?

Re: I'm scheduled for a nonstress test soon... what should I expect? And what exactly is my doctor looking for?

The Bump Expert

Good news: The nonstress test lives up to its name, both for you and baby. It's totally noninvasive, and poses no risk to baby. Be prepared, though -- it can easily take up to 40 minutes (make a bathroom stop first!), and might be a little noninteresting for you.

The nonstress test evaluates baby's wellbeing by measuring how her heart rate responds to movement. It's a fetal monitoring method, meaning the purpose is simply to check on her well-being -- not cure a problem or ensure that baby's born healthy. It's normally performed after 28 weeks, most often in post term and high-risk pregnancies.

For the test, a Doppler device will be strapped around your belly with a belt. The device is attached to ultrasound transducers which measure baby's heart rate. At the same time, baby's movements will be recorded, either with another device placed around your abdomen or a button that you press. If baby isn't doing much moving, she's probably snoozin'. Your doc may use a (completely safe!) buzzer-like device to create sound and vibration to wake her, or ask you to eat or drink something to encourage a stir.

What's your doc looking for? Ideally, baby's heart rate will quicken when she moves. If this isn't the case, there could (meaning no need to freak out!) be a problem with baby's health, and your doc may recommend repeating the test or doing another procedure such as a contraction stress test. If baby doesn't respond after an hour and a half or so, you also may be asked to repeat the test.

American College of Obstetrics and Gynecologists. Your pregnancy and birth. 4th ed. Washington, DC: ACOG; 2005.

The Bump Editors

Q&A: Nonstress test during pregnancy?

Someone gave me a really great tip which was to make sure your hospital bag was in the car during your appointment just in case the non-stress test indicates you need to be induced. Then you will have everything you need to go.

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