In some women, cervical incompetence or cervical insufficiency occurs with the inability of the cervix to stay closed during the entire pregnancy. It does not cause first-trimester miscarriages. In the second trimester, it is associated with an increased risk of miscarriage. It is identified after a premature birth has occurred at about 16–18 weeks into the pregnancy. During the second trimester, major trauma can result in a miscarriage.
In some women cervical incompetence or cervical insufficiency occurs with the inability of the cervix to stay closed during the entire pregnancy It does not cause first-trimester miscarriages In the second trimester it is associated with an increased risk of miscarriage It is identified after a premature birth has occurred at about 16–18 weeks into the pregnancy During the second trimester major trauma can result in a miscarriage