Background: Cerclage for uterine cervical incompetence can be performed by the transabdominal or transvaginal approach. Transabdominal cerclage (TAC) is indicated for women with a short cervix or a cervical laceration who are inapplicable to transvaginal cerclage (TVC). The larger the volume of tissue removed in cervical conization, the greater the rate of miscarriage or preterm delivery in the subsequent pregnancy.
Aims: The aim of this study was to compare TAC and TVC in post-cervical conization pregnancies.
Methods: A retrospective, two-group, comparative study was conducted involving subjects who underwent cervical cerclage (TAC, n = 14; TVC, n = 18) following cervical conization and who were cared for at the University of Miyazaki Hospital between 2008 and 2020. We compared study subject characteristics and outcomes between the two groups. Primary outcome was incidence of preterm labor <37 weeks of gestation between the two groups.
Results: The preoperative median cervical length was significantly shorter in the TAC group (20.0 mm) than in the TVC group (31.0 mm; p < 0.01). Preoperative vaginal discharge cultures positive for Gardnerella showed a tendency to be greater in the TAC group (p = 0.073). There was no significant difference in the preterm delivery rate < 37 weeks of gestation between TAC (1/14, 7.1%) and TVC (6/18, 33.3%) groups, p = 0.10. Noninferiority test using multiple regression analysis showed that TAC is not inferior to TVC regarding gestational age at delivery, even though cervical length of TAC was significantly shorter.
Conclusion: Women who were inapplicable to TVC due to a short cervix still achieved an equivalent outcome with TAC.
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