Cerclage outcomes in singleton pregnancies at risk for preterm birth following assisted reproductive treatments

Objective: We aimed to evaluate the obstetric and neonatal outcomes of singleton pregnancies at risk for preterm birth (PTB) following assisted reproductive treatments and underwent cervical cerclage placement. Material and methods: A total of 42 women with singleton pregnancies following ART who underwent cerclage between 2009-2021 were included in this retrospective study.  Indications of the cerclage procedure, gestational age at cerclage placement and delivery, neonatal birthweight, and requirement for admission to the neonatal unit of newborns were evaluated. Results: Of those cerclage placement performed in women with a history of second-trimester loss (19%), women with suspected cervical insufficiency according to pre-pregnancy evaluation (52.4%), women with the unicornuate uterus (4.8%), women with cervical shortening/or suspicious changes on ultrasonography (11.9%), and women with detection of cervical dilatation/shortening beyond 20 weeks of gestation (11.9%). Of the total group, 7.1% resulted in late miscarriages, while the remaining 92.9% ended with a live birth with mean gestational age at delivery of 37.0±2.5 weeks. Of those live births, 92.3% (36/39) delivered at >34 weeks and %74.4 (29/39) delivered at term. Except one neonatal death due to extremely PTB at 26th weeks, all infants were discharged from the hospital with well condition. Conclusion: ART pregnancies are evaluated as a special group as having a higher PTB risk at baseline. Cerclage may be considered in broader indications for suspected cervical insufficiency in these pregnancies. There is need for further studies on the effectiveness of cerclage in these ART pregnancies with suspected cervical insufficiency based on different criterions used.