ATI OB Obstetrics RN 300 Exam | Nurselytic

Correct Answer: A

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A): Variable decelerations are due to umbilical cord compression. This is because variable decelerations are characterized by abrupt decreases in fetal heart rate, often with a rapid onset and recovery, which typically occur due to the compression of the umbilical cord during contractions. The decrease in blood flow through the umbilical cord leads to transient hypoxia and subsequent deceleration in the fetal heart rate. This interpretation aligns with the timing and characteristics of variable decelerations observed during labor.

Summary of Incorrect

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B: Variable decelerations are not caused by the administration of IV narcotic analgesics. Narcotic analgesics may cause other effects on the fetus, but they are not directly associated with variable decelerations.
C: Variable decelerations are not primarily caused by uteroplacental insufficiency. Uteroplacental insufficiency typically leads to late decelerations, not variable deceler

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