12 doctors weighed in:
Why would my doctor say my cervix is incompetent?
12 doctors weighed in

Dr. Bac Nguyen
Family Medicine
11 doctors agree
In brief: Opens up too early
The cervix normally has a very small opening--the os--even during pregnancy.
It should remain so until close to delivery at which time passage of the baby through the os is needed. Thus, close to birth time, the cervix begins to dilate from about <1cm to 10. If dilating too early (opens up), there is risk of preterm delivery, hence concerning for incompetent cervix. Hope that helps. Good luck.

In brief: Opens up too early
The cervix normally has a very small opening--the os--even during pregnancy.
It should remain so until close to delivery at which time passage of the baby through the os is needed. Thus, close to birth time, the cervix begins to dilate from about <1cm to 10. If dilating too early (opens up), there is risk of preterm delivery, hence concerning for incompetent cervix. Hope that helps. Good luck.
Dr. Bac Nguyen
Dr. Bac Nguyen
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