Factors Associated with Successful Vaginal Delivery in Nulliparous Women with a Pre-Pregnancy Body Mass Index of 30kg/m² or Higher

Abstract

 Objective: The aim of this retrospective study was to determine the factors associated with the success of vaginal delivery（VD）in nulliparous women with a pre-pregnancy body mass index（BMI）of ≥ 30 kg/m²

 Patients and Methods: Nulliparous women with a pre-pregnancy BMI of ≥ 30kg/m² who attempted VD at our hospital between January 2018 and August 2022 were enrolled for the final analysis. A logistic regression analysis was performed to determine the factors associated with the success of VD.

 Results: A univariate logistic analysis revealed that only pre-pregnancy BMI（kg/m²）was a significant factor associated with the success of VD. Furthermore, receiver operating characteristic analysis demonstrated that the optimal cutoff value of pre-pregnancy BMI for predicting the success of VD in nulliparous women with a pre-pregnancy BMI of ≥ 30kg/m² was 34.5kg/m².

 Conclusion: A diet aiming for a pre-pregnancy BMI of ≤ 34.5kg/m² may be effective in avoiding cesarean delivery in nulliparous obese women with a pre-pregnancy BMI of ≥ 30kg/m².