Final answer:
The range for cervical dilation during labor is typically 0-10 cm. In order for vaginal birth to occur, the cervix must fully dilate to 10 cm in diameter. This stage of labor can take 6-12 hours.
Step-by-step explanation:
The range for cervical dilation during labor is typically 0-10 cm. In order for vaginal birth to occur, the cervix must fully dilate to 10 cm in diameter, which is wide enough for the newborn's head to pass through. The dilation stage is the longest stage of labor and can take 6-12 hours, but it can vary widely depending on factors such as whether the mother has given birth before.