incompetent cervical os


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in·com·pe·tent cer·vi·cal os

a defect in the strength of the internal os allowing premature dilation of the cervix.

in·com·pe·tent cer·vi·cal os

(in-kom'pĕ-tĕnt sĕr'vi-kăl os)
A defect in the strength of the internal os allowing premature dilation of the cervix.

incompetent cervical os

A uterine cervix that cannot maintain a diameter small enough to support the increasing weight of the fetus. This condition usually results in early second trimester abortion. The cause is a congenital structural defect or previous trauma to the cervix. It is treated with a purse-string ligature that encircles, encloses, and reinforces the cervix.
See also: os