The cervical canal disappears slowly with the increase of the uterine strength after the prodromal period. So far, if it is within the normal range, it is not recommended to intervene to make the cervical canal disappear faster. The cervical canal will only disappear slowly as the uterus strengthens, and it should not be sought too quickly, so as not to cause strong uterine contractions clinically, which will cause more serious consequences such as uterine rupture and placental abruption, which will directly threaten the life of the pregnant woman and the fetus. If there are regular contractions later, the labor will be longer in primiparous women and the pain will take longer to make the cervix slowly disappear. In the case of menstruating mothers, the cervical canal disappears relatively quickly, so there is no need to force it clinically. If the cervical canal does not disappear, the cervix is hard or the posterior fornix has become very thin when stalled labor occurs or when contractions occur, it may cause the rupture of the posterior fornix, and clinically a cesarean delivery can be chosen.