gynecology and obstetrics
Cervical Insufficiency
Key Points
Cervical insufficiency is painless cervical dilation resulting in 2nd-trimester pregnancy loss. Usually, risk of cervical insufficiency cannot be predicted before a patient has a first premature delivery. Do transvaginal ultrasonography after 15 to 16 weeks if women have risk factors or symptoms. Findings that suggest the diagnosis are cervical shortening to ≤ 2.5 cm, cervical dilation, or protrusion of fetal membranes into the cervical canal. Treat at-risk women with cervical cerclage. 