Nonstress test
Nonstress test
A Nonstress test (pronunciation: non-stress test) is a common prenatal test used to check on a baby's health.
Etymology
The term "Nonstress test" is derived from the fact that this test is non-invasive and does not put any stress on the baby or the mother.
Definition
A Nonstress test is a type of test performed during pregnancy. It measures the heart rate of the unborn baby in response to its own movements. The heart rate of the baby is expected to increase with each movement. This test is usually performed in the third trimester of pregnancy.
Procedure
During a Nonstress test, the pregnant woman is made to sit in a reclining chair. Two belts are strapped around her abdomen, one to measure the baby's heart rate and the other to detect contractions. The test usually lasts for 20 to 30 minutes.
Interpretation
The results of a Nonstress test are usually classified as either reactive (normal) or non-reactive (not normal). A reactive result means that the baby's heart rate increased as expected during the test. A non-reactive result means that the baby's heart rate did not increase as expected, which might indicate that the baby is not getting enough oxygen.
Related Terms
External links
- Medical encyclopedia article on Nonstress test
- Wikipedia's article - Nonstress test
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