While the seven cardinal movements is considered the normal mechanism for labor and delivery of human babies, pelvic sizes and shapes can vary among female humans which can increase the risk of errors in rotations and delivery, especially since these moments are done completely by the baby. One of the biggest issues with the pelvic shape for childbirth is the Ischial spine. Since the ischial spines support the pelvic floor, if the spines are too far apart it can lead to a weakened pelvic floor muscles. This can cause issues as pregnancy progresses, such as difficulty carrying the fetus to full term. Another complication that can occur during human childbirth is shoulder dystocia, where the shoulder is stuck in the birth canal. This can lead to fractured humerus and clavicle of the fetus and hemorrhaging of the mother postpartum. Thus, these neonatal rotations are important in allowing the baby to safely pass through the pelvic and ensure the health of the mother as well.