Cerclage involved suturing the cervix closed to prevent premature birth.


(1) second trimester

(2) painless cervical dilation > 2 cm

(3) membranes visible

(4) intact membranes

(5) history of preterm birth



(1) chorioamnionitis

(2) uterine contractions and/or labor

(3) significant vaginal bleeding


A worse outcome may be associated with significant cervical dilation and a short cervical length (< 1.5 cm).

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