How many significant accelerations are required in a fetal heart tracing for it to be classified as reactive?

A fetal heart tracing is classified as reactive when there are at least two significant accelerations in a 20-minute period. Significant accelerations are defined as a rise in the fetal heart rate of at least 15 beats per minute above the baseline, lasting for at least 15 seconds. This criterion is important as it indicates that the fetus is experiencing adequate oxygenation and neurologic function, reflecting well-being in utero.

In the context of monitoring fetal heart rates, having at least two accelerations helps ensure that the pattern is consistent and not due to transient changes. This provides healthcare providers with confidence regarding the health status of the fetus, guiding further management and decision-making during pregnancy and labor.