Now belly of the baby, at 20-30 minute intervals, has repeatedly take place or slept. When it comes to this time, that the NST (non stress test) in prenatal care, baby by observing the changes in the baby's heart rate is to give you a test to confirm whether or not the healthy. This test is usually 40 minutes, you measure the baby's heart rate, but the time that this 40 minutes, has to do with the sleep rhythm of today's baby. And if 40 minutes, it is even initially occurred in the middle also baby was sleeping, because can observe the heart rate when awake.
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