What is the NST Test?

NST (Non-Stress Test) is a test performed during pregnancy to monitor the baby's health. This test tracks the baby's heartbeats and uterine contractions to assess the baby's oxygen intake and overall condition. NST is an important screening test, especially in high-risk pregnancies or during the period close to delivery.

The NST test is a routine test performed to monitor the baby’s health. This test evaluates the baby’s oxygen levels, indicating that the baby is growing healthily and is ready for birth. Additionally, the NST test can help determine the appropriate time for labor to begin during the last weeks before delivery. If the baby’s heart rate is low or high, or if there are uterine contractions, doctors can use this information to decide the right time to initiate labor.

The purpose of the NST is to monitor the baby’s health and to detect any prenatal complications early. Its benefits include:

• Monitoring the Baby’s Oxygen Status: Regular heartbeat indicates that the baby is receiving sufficient oxygen.
• Monitoring the Baby’s Movements: An increase in heart rate when the baby moves is normal for a healthy baby.
• Monitoring High-Risk Pregnancies: NST plays an important role in monitoring mothers with conditions such as hypertension, diabetes, and preeclampsia.
• Prenatal Health Checks: NST provides information about the baby’s condition as the due date approaches, aiding in birth planning.

The NST test is performed during the last weeks of pregnancy, usually within the last 4 weeks before delivery. This test is conducted by a doctor or nurse, typically in a hospital or birthing center. During the test, the mother lies comfortably while a monitor device records the baby’s heart rate and uterine contractions. The test usually lasts 20-30 minutes and is painless.

The NST test is generally done after the 28th week, in the third trimester of pregnancy. Electrodes placed on the mother’s abdomen monitor the baby’s heartbeats and uterine contractions. The test typically takes 20-40 minutes and does not cause any pain. The mother lies comfortably on her back during the test.

• Baby’s Heartbeats: Heart rate acceleration is expected when the baby moves. The test monitors these accelerations and the baby’s baseline heart rate.
• Uterine Contractions: Contractions in the mother’s uterus are also monitored. These contractions may be signs of approaching labor, but not every contraction indicates labor.

The NST (Non-Stress Test) usually lasts between 20 and 40 minutes. However, the duration may be extended depending on the baby’s movements and changes in heart rate. Here are the details:

In most cases, the NST is completed within 20 minutes. During this time, the baby's heart rate and movements are sufficiently monitored.

• Baby Being Asleep:
  If the baby is asleep or not moving enough during the test, the duration may be extended up to 40 minutes to obtain more accurate results.
  In such cases, the mother may be advised to gently change her position, have a light snack, or drink water to help wake the baby.
• Need for Additional Monitoring:
  If the baby's heart rate or movements are not sufficiently assessed during the test, the doctor may continue monitoring for an extended period.

NST is generally performed in the following situations:

• High-Risk Pregnancies: In cases such as hypertension, diabetes, preeclampsia,
• Decrease in Baby’s Movements: When there is a reduction in fetal movements,
• Post-Term Pregnancy: For prenatal monitoring at 40 weeks and beyond,
• Multiple Pregnancies: Monitoring may be done for mothers carrying twins or more.