This is not a routine test. A doctor will use this any time after 26-28 weeks for high-risk pregnancies to ensure that the baby is getting enough oxygen and is not in any kind of distress. This test is simple and non invasive. It is called “non stress” because no/minimal stress is placed on the baby.
A doctor may also use this also for low-risk pregnancies, if the mothers report lack of foetal movement, or if they are overdue.
The NST can help a doctor make sure that the baby is receiving enough oxygen and is responding to stimulation. Usually a healthy baby moves a lot. Even if the baby does not respond as expected, it does not confirm that the baby is in danger. In those cases, further testing like the Biophysical Profile (BPP) is conducted.
Here is how the NST is conducted
Sometimes, a biophysical profile (BPP) is done to determine problems with the baby. In this the doctor combines inputs from many other sources as well. The sources for a BPP include:
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