Which of the following is a suitable treatment for late decelerations during labor?

Late decelerations during labor indicate potential fetal distress, often due to uteroplacental insufficiency, leading to inadequate oxygenation of the fetus. The primary concern is to optimize the fetal environment and respond effectively to these decelerations.

Considering the correct choice, stopping oxytocin is appropriate because oxytocin is used to induce or augment labor. If late decelerations occur while oxytocin is being administered, it may be exacerbating the situation by increasing uterine contractions, which could further compromise blood flow to the fetus. Thus, discontinuing oxytocin can relieve excessive uterine activity and potentially improve the situation by allowing the fetal heart rate to stabilize.

In contrast, increasing fluid intake, while potentially beneficial in some labor contexts (such as when hydration might help), does not directly address the underlying cause of late decelerations. Applying external monitors can help assess fetal heart rate but does not treat the cause of the decelerations. Administering additional oxytocin may worsen late decelerations by intensifying contractions, thereby further decreasing oxygen flow to the fetus. Therefore, considering stopping oxytocin is the most appropriate action in this scenario.