J Gynecol Obstet Hum Reprod
April 2023
Eur J Obstet Gynecol Reprod Biol
September 2017
Aim: Compare preterm births before 30 weeks of gestation in women with a previous failed McDonald cerclage that benefit from another McDonald cerclage (or simplified Shirodkar cerclage) or a vaginal cervico-isthmic cerclage.
Methods: Women with a cerclage performed at the end of the first trimester of a singleton pregnancy with a previous failed prophylactic McDonald cerclage were included in this mutlicenric study involving four teaching hospitals. Comparisons between groups were done using a chi square test and a student t-test.