What is Cervical Dilation?

Once the cervical effacement has been established, the cervix will begin to stretch out. This is called cervical dilation. Cervical dilation is measured in centimeters from 0 to 10. 0 corresponds to a closed cervix and 10 to a completely dilated cervix. Dilation is seen in the third trimester closer to the due date. 

Question: How long will it take to reach complete dilation in a primigravida?

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