What is the first intervention to take when recurrent late decelerations occur?

Recurrent late decelerations indicate that the fetus may be experiencing decreased oxygenation, often related to uteroplacental insufficiency. The first and most important intervention is to change the mother's position. This maneuver can help relieve pressure on the umbilical cord or improve uteroplacental blood flow, thereby potentially alleviating the cause of the late decelerations.

Changing the maternal position, particularly to the left lateral position, can enhance venous return and improve placental perfusion. This adjustment often leads to a more favorable fetal heart rate pattern, supporting the well-being of the fetus.

Other interventions, such as starting intravenous fluids or administering oxygen, may also be important but typically follow the initial position change. Preparing for an emergency cesarean would generally not be the first line of response unless there are additional factors indicating an immediate risk to the mother's or the fetus's health. Thus, changing the mother's position is prioritized to address the issue promptly and effectively.