A nurse is performing a nonstress test for a client who is at 38 weeks of gestation. The fetal monitor tracing reveals a series of late decelerations. Which of the following interventions should the nurse implement first?

Choice A rationale Late decelerations indicate uteroplacental insufficiency, meaning reduced blood flow and oxygen to the fetus. Placing the client in a lateral position (left or right side) can alleviate pressure on the vena cava, improving venous return to the heart, thus increasing cardiac output and uteroplacental perfusion. This is the least invasive initial intervention. Choice B rationale While intravenous fluid administration may be indicated in some cases to improve maternal hydration and placental perfusion, repositioning the client is a more immediate and less invasive intervention to address uteroplacental insufficiency by optimizing maternal circulation and oxygen delivery to the fetus. Choice C rationale Preparing for a cesarean birth is a significant intervention reserved for persistent or severe fetal distress that does not respond to less invasive measures. Although late decelerations are concerning, immediate surgical intervention is not the first step without attempting to optimize fetal well-being through maternal repositioning. Choice D rationale Elevating the client's legs might slightly increase venous return, but it is not the primary intervention for late decelerations. The lateral position is more effective in relieving aortocaval compression, directly addressing the underlying issue of reduced placental blood flow, and is the established first-line intervention.