What is the role of the cervix during labor?

The role of the cervix during labor is primarily to dilate and allow for the passage of the baby. Throughout pregnancy, the cervix acts as a barrier, holding the baby in the uterus and preventing preterm labor. However, as labor begins, the cervix undergoes significant changes. It softens, thins, and gradually opens (dilates) in response to hormonal signals and contractions. This dilation is essential for the baby to pass through the birth canal during delivery. The cervix's ability to expand creates the necessary space for the fetus to move downward and ultimately be born. Thus, option C accurately reflects the critical function of the cervix during labor.