Definition: The cervical os is the opening of the cervix into the endocervical canal. The os opens, or dilates, during labor to allow the passage of the baby through the vagina.
By Tracee Cornforth, About.com
Updated: December 14, 2007
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
Definition: The cervical os is the opening of the cervix into the endocervical canal. The os opens, or dilates, during labor to allow the passage of the baby through the vagina.
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