What is the term for the head's external rotation after delivery?

Restitution is the correct term for the head's external rotation after delivery. This process occurs right after the baby’s shoulders emerge, allowing the head to turn to its original position following the delivery. As the fetus descends through the birth canal during labor, the head rotates to fit into the maternal pelvis and then, upon delivery of the shoulders, it returns to a neutral position. This natural movement helps facilitate the baby's transition from the intrauterine environment to the outside world, ensuring a smoother delivery process.

Internal rotation, on the other hand, refers to the movement of the fetal head as it turns to navigate through the pelvis and into the optimal position for delivery. Presentation describes the part of the fetus that is closest to the cervix during labor, often categorized as vertex, breech, or transverse. Engagement refers to the descent of the fetal head into the pelvis, marking the point where the largest diameter of the fetal head enters the pelvic inlet. Each of these terms relates to different mechanisms or stages of labor but does not specifically define the external rotation that occurs right after the delivery of the head, which is why restitution is the most accurate answer.