A non-stress test (NST) is a prenatal test used to assess the well-being of a fetus in utero, typically during the third trimester of pregnancy. It is a non-invasive procedure that measures the baby's heart rate in response to its movements.
During an NST, the pregnant individual lies on a comfortable reclining chair or bed, and sensors are placed on the abdomen to monitor fetal heart rate and uterine contractions. The test usually lasts for about 20-30 minutes but can be extended if necessary.
The goal of an NST is to evaluate the baby's heart rate patterns and variability in response to its own movements. A healthy fetus will exhibit accelerations in heart rate when it moves, indicating adequate oxygenation and neurological function. These accelerations are considered reassuring signs of fetal well-being.
If the NST reveals non-reactive or concerning heart rate patterns, further evaluation or interventions may be recommended, such as additional testing, fetal movement counting, or delivery if the pregnancy is near term.
Overall, NSTs are valuable tools in prenatal care for monitoring fetal health and identifying potential concerns that may require further evaluation or management. They provide valuable information to healthcare providers to ensure the best possible outcomes for both mother and baby.
