![]() This movement is also known as restitution. External Rotation/Restitution: Once the baby’s head is born, the baby must rotate from facing head down to either right or left to fit the shoulders around and under the mother’s pubic arch.The baby’s head, face, and chin appear outside the mother. The baby’s head must extend back to accommodate the upward curvature of the birth canal. Extension: Usually, the back of the baby’s head is against the mother’s pubic bone as it passes through the vaginal opening.Usually, the baby faces down toward the mother’s spine, although sometimes the baby faces the mother’s pubic bone. The baby’s head rotates to accommodate these changes in the diameter of the mother’s pelvis. ![]() Now, with the baby reaching the mother’s pelvic floor, the widest diameter of the mother’s pelvis is from front to back. ![]()
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