Additional risk stratification in women with a history of spontaneous preterm birth and a midtrimester cervical length > 25 millimeters

Women with a history of sPTB before 34 weeks of GA and a cervical length of > 25-30 mm before the 24 weeks of gestation have an almost four times higher risk for a recurrent sPTB, compared to those with a longer cervical length. No association was found between decrease in cervical length and the risk of sPTB. Future studies should assess whether women with a history of sPTB and a cervical length of > 25-30 mm benefit from cerclage and cutoff values could be revised accordingly.