Which combination of features indicate non-reassuring FHR patterns?

• A. Normal variability and accelerations
• B. Absent variability and late decelerations
• C. Moderate variability and a stable heart rate
• D. None of the above

Answer: (B)

Non-reassuring fetal heart rate (FHR) patterns are those that may indicate potential fetal distress and could require further intervention during labor. The correct combination of features indicating such patterns includes absent variability and late decelerations.

Absent variability suggests a lack of responsiveness from the fetus, indicating that there may be stress or other concerns affecting the fetal well-being. Late decelerations, which occur after a contraction has peaked and return to baseline after the contraction is over, are often associated with uteroplacental insufficiency. Together, these findings articulate a concerning scenario that warrants close monitoring and potentially immediate actions to ensure fetal safety.

In contrast, normal variability and accelerations are reassuring features that typically indicate a healthy, well-oxygenated fetus. Moderate variability and a stable heart rate also signal a robust fetal state and do not reflect distress. Therefore, the combination of absent variability and late decelerations stands out as indicative of non-reassuring FHR patterns that require prompt evaluation and potential intervention.