A nurse is caring for a laboring woman, and notices a pattern of variable decelerations in fetal heart rate with uterine contractions. What is the nurse's initial action?

Choice A rationale Variable decelerations are often caused by umbilical cord compression, which temporarily impedes blood flow, causing a rapid, abrupt decrease in fetal heart rate (FHR). The initial action to alleviate this is repositioning the woman (e.g., left lateral, right lateral, or knee-chest) to potentially relieve pressure on the cord, improving utero-placental circulation and correcting the FHR pattern. Choice B rationale Increasing the intravenous flow rate provides a fluid bolus, which may increase maternal blood volume and improve placental perfusion, thereby treating maternal hypotension and associated late decelerations. While a useful intervention for variable decelerations if hypotension is suspected, it is secondary to repositioning for cord compression. Choice C rationale Stopping the oxytocin infusion is the primary intervention for uterine tachysystole (excessive uterine contractions) which can cause late decelerations due to reduced uterine blood flow. Variable decelerations are primarily linked to cord compression, making repositioning and amnioinfusion more direct treatments, so stopping oxytocin is not the initial action. Choice D rationale Administering oxygen via nasal cannula aims to increase maternal oxygen saturation, thereby potentially increasing the amount of oxygen crossing the placenta to the fetus. This is typically indicated for late decelerations or prolonged decelerations associated with uteroplacental insufficiency, and is not the initial action for variable decelerations.