There is no relationship between the length of the cervical canal and the difficulty of delivery. As long as the maturity of the cervical canal is good, even if the canal is slightly longer, it will not affect normal delivery. The normal length of the cervical canal is about 2.5-3 cm. As the due date approaches, the cervical canal will slowly become shorter, and after the start of regular contractions, the canal will accelerate its shortening until it completely disappears and becomes part of the birth canal before labor begins. The length of time experienced during this process varies greatly, starting with regular contractions, it usually takes about 11-12 hours, but some women experience a longer time, especially first-time mothers, and the cervical canal disappears more quickly compared to menstruating mothers, usually in about 6-8 hours.