How long does it take to produce cervical flattening?

Women can not see how long after the birth of cervical flattening, some women will be in the cervical flattening after 8 to 9 hours of production, some women will be in the cervical flattening after more than 10 hours of production, different maternal differences are very large, the specific situation to wait for the cervical flattening, cervical dilation to 10 cm before delivery. In addition, the uterus is fully opened within 2 hours, and the mother needs to give birth to the fetus. If the baby is not delivered for more than 2 hours, it proves that the birth is not too smooth. Therefore, it is not how long the cervix is flattened, but how long the uterus can be opened to 10 cm to give birth.