Vaginal Birth
Contractions help your cervix dilate -- or open -- so your baby can pass through the birth canal. You're fully dilated when your cervical opening measures 10 centimeters. As the cervix opens, it also thins (effaces) in preparation for delivery.
Review Date: June 29, 2001
Reviewed By: Peter Chen, M.D., Obstetrics and Gynecology, University of
Pennsylvania School of Medicine. Review provided by VeriMed Healthcare
Network.
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