The first stage of labor for primiparas is to relax the cervix to 3CM. It takes 8- 12 hours. The second stage of labor takes 4-8 hours from 3CM to 10CM. Only when the cervix is open to 10CM can the third stage of labor be reached, and it is considered that the cervix is fully open and labor can be delivered. Generally, it will take a long time from the cervix to delivery. It can be born in a few minutes or ten minutes.