Recurrence rates after abdominal and vaginal cerclages in women with cervical insufficiency: a validated cohort study.

Purpose: To estimate the incidence of cervical insufficiency and compare recurrence rates of second trimester miscarriage/delivery in second and third pregnancies after prophylactic vaginal cerclage, abdominal cerclage, or no cerclage.

Methods: Retrospective chart review of a representative register-based sample of 621 women with a spontaneous second trimester miscarriage/delivery in the first pregnancy in Denmark (1997-2012). We used strict criteria for the diagnosis of cervical insufficiency.

RETRACTED: Long-term follow-up after abdominal cerclage: A population-based cohort study.

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Validation of second trimester miscarriages and spontaneous deliveries.

Objective: To validate the diagnosis of second trimester miscarriages/deliveries (16+0 weeks to 27+6 weeks of gestation) recorded as miscarriages in the Danish National Patient Registry or spontaneous deliveries in the Danish Medical Birth Registry, and asses the validity of risk factors, pregnancy complications, and cerclage by review of medical records.

Materials And Methods: In a cohort of 2,358 women with a second trimester miscarriage/delivery in first pregnancy and a subsequent delivery during 1997-2012, we reviewed a representative sample of 682 medical records. We searched for clinically important information and calculated positive predictive values of the registry diagnoses stratified by type of registry, as well as sensitivity, specificity, positive predictive value, and kappa coefficients of risk factors, pregnancy complications, and cerclage.