Fetal variability that is classified as marked is defined as greater than what bpm?

• A. 5 bpm
• B. 15 bpm
• C. 25 bpm
• D. 35 bpm

Answer: (C)

Marked fetal variability is an important indicator of fetal well-being and is characterized by a significant fluctuation in the fetal heart rate (FHR). Specifically, marked variability is defined as a variation in the heart rate that exceeds 25 beats per minute (bpm). This level of variability suggests that the fetus has a responsive and healthy autonomic nervous system and indicates adequate oxygenation and overall well-being.

Variability can be classified into several categories: absent, minimal, moderate, and marked. Moderate variability, which signifies a range of 6 to 25 bpm, is considered normal and reassuring. When the variability exceeds 25 bpm, it is categorized as marked, which can indicate a healthy fetal state, although excessive variability may sometimes warrant further evaluation.

This understanding is vital in clinical settings as monitoring fetal heart rate patterns can assist healthcare providers in determining the appropriate management of labor and delivery and the need for potential interventions.