Fetal Monitors Product Subcategory:

NST Stress Test Results

• Reactive. Before week 32 of pregnancy, results are considered normal (reactive) if the baby's heartbeat accelerates to a certain level above the baseline twice or more for at least 10 seconds each within a 20-minute window. At week 32 of pregnancy or later, if the baby's heartbeat accelerates to a certain level above the baseline twice or more for at least 15 seconds each within a 20-minute window, the results are considered reactive.
• Nonreactive. If the baby's heartbeat doesn't meet the criteria described above, the results are considered nonreactive. Nonreactive results might occur because the baby was inactive or asleep during the test.