Which intervention is appropriate for managing persistent late decelerations?

Persistent late decelerations indicate fetal heart rate patterns that are often associated with uteroplacental insufficiency, which can compromise the fetus's oxygen supply. This situation requires immediate and effective management to ensure fetal well-being.

Increasing maternal oxygenation is a critical intervention because it can help improve oxygen delivery to the fetus, particularly in situations where there may be reduced perfusion or oxygenation. This can be achieved through methods such as administering supplemental oxygen to the mother. Additionally, considering delivery strategies is vital if the decelerations are severe or persistent, as the health and safety of both the mother and the fetus may necessitate timely delivery.

The other choices do not effectively address the problem posed by late decelerations. Encouraging ambulation may not be suitable since it can potentially exacerbate the insufficiency if there are already significant concerns. Pain relief medications are unlikely to have a direct positive impact on the fetal heart rate pattern and could inadvertently delay more crucial interventions. Finally, merely monitoring fetal movements without taking action would not provide any benefit in alleviating the situation, as it does not address the underlying issue causing the late decelerations.