What are the seven cardinal movements that occur during the second stage of labor?

• A. Descent, engagement, flexion, internal rotation, extension, external rotation, and expulsion
• B. Descent, engagement, internal rotation, extension, external rotation, reposition, and expulsion
• C. Descent, engagement, flexion, extension, external rotation, positioning, and delivery
• D. Descent, engagement, flexion, internal rotation, extension, and external rotation

Answer: (D)

During the second stage of labor, the seven cardinal movements describe how the fetus navigates through the birth canal to facilitate delivery. The correct sequence includes descent, engagement, flexion, internal rotation, extension, external rotation, and expulsion.

Descent is the initial movement where the fetal head moves deeper into the pelvis. Engagement follows, where the largest diameter of the fetal head reaches the pelvic inlet. Flexion occurs as the chin tucks towards the chest, reducing the fetal head's diameter as it interacts with the pelvic structures. Internal rotation allows the fetus to turn to accommodate the shape of the pelvis, typically rotating from a transverse to an anterior or posterior position.

Extension follows once the head reaches the vaginal introitus, where the fetal neck straightens, leading to the delivery of the head. External rotation, also known as restitution, occurs as the shoulders align with the pelvic plane and rotate to facilitate birth. Finally, expulsion is the final movement where the body is delivered after the head.

This comprehensive understanding of these movements is crucial for healthcare providers to manage and support the labor process effectively, ensuring safety for both the mother and the newborn. The incorrect options either omit essential movements or include terms that do not accurately reflect the established movements