What is the amplitude range that defines moderate fetal heart rate (FHR) variability?

Moderate fetal heart rate (FHR) variability is defined by an amplitude range of 6 to 25 beats per minute (bpm). This range indicates that the fetal heart rate is responding appropriately to neurological and physiological influences, typically reflecting good fetal oxygenation and a healthy autonomic nervous system. Moderate variability is a reassuring sign in fetal heart monitoring, as it suggests that the fetus is experiencing a normal level of activity and does not exhibit signs of distress. In contrast, lower variability might indicate some issues, while higher variability can occur in certain scenarios but is not typically classified under moderate. Understanding these ranges is crucial for clinicians to assess fetal well-being accurately.