What is the fetal heart rate (FHR) variability range indicating minimal variability?

Fetal heart rate (FHR) variability is a crucial aspect of fetal monitoring, reflecting the autonomic nervous system's response and the wellbeing of the fetus. Minimal variability is characterized by fluctuations in the heart rate that are less than or equal to 5 beats per minute (bpm). This range indicates limited responsiveness of the fetal heart rate to physiological stimuli and may suggest potential fetal distress or other issues that require further investigation.

The presence of minimal variability is significant because it can be an early indicator of compromised fetal oxygenation, making it essential for healthcare providers to monitor and assess this parameter closely. A FHR variability of less than or equal to 5 bpm is classified as minimal and suggests that the fetus may not be adequately responding to environmental factors, which can be a concern during labor and delivery.