What happens during a nonstress test during pregnancy?
When you get a nonstress test (NST), you'll lie down with two belts around your belly. One measures your baby's heartbeat and the other measures contractions. When you feel the baby kick or move, you may press a button so your doctor can see how the baby's heartbeat changed while moving. The test will take about 20 minutes.
If your baby seems to be sleeping, a nurse may try to wake up your baby by ringing a bell, moving your belly or by using an acoustic stimulator.
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