What defines moderate fetal heart rate variability?

Moderate fetal heart rate variability is characterized by an amplitude of 6-25 beats per minute (bpm). This measure reflects the healthy functioning of the fetal autonomic nervous system, indicating a well-oxygenated fetus capable of adapting to environmental changes. Moderate variability is a reassuring sign and helps healthcare providers assess fetal well-being during labor and delivery. It is essential in monitoring fetal health, as adequate heart rate variability suggests that the fetus is not under distress.

The other options do not accurately define moderate variability. Fluctuations of 1 cycle per minute or measurements of less than or equal to 5 cycles per minute denote lower variability, which can be indicative of potential fetal distress. Conversely, an amplitude greater than 25 bpm signifies marked variability, which, while often a positive sign, can also require further assessment depending on the clinical context. Understanding this range helps practitioners monitor the fetal condition effectively.