Abstract
Purpose
To determine the factors associated with successful trial of labor after cesarean (TOLAC) among grand-multiparous (GMP) women.
Methods
A retrospective cohort study was conducted, including all GMP women (≥ 5 deliveries) undergoing TOLAC during 3/2011 and 6/2020, delivering a singleton cephalic newborn. Factors associated with successful vaginal delivery were examined by multivariable analysis.
Results
Overall, 381/413 (92.2%) GMP succeeded TOLAC. Maternal characteristics did not differ between TOLAC success and TOLAC failure groups. Previous cesarean delivery characteristics did not differ between study groups. The median number of previous vaginal births after cesarean was 2 [interquartile range 1–4]. Gestational age at TOLAC was lower in the success group (mean 371/7 ± 36/7 vs. 385/7 ± 31/7 weeks, p = 0.028). A lower rate of modified Bishop score < 4 was associated with TOLAC success [149 (39.1%) vs. 22 (69%), odds ratio (OR) 95% confidence interval (CI) 0.29 (0.13–0.64), p = 0.001]. The rate of induction of labor was higher in the TOLAC failure group [120 (31.5%) vs. 17 (53%), OR 95% CI 0.40 (0.19–0.83), p = 0.013]. The rate of oxytocin administration was higher in the TOLAC failure group [94 (24.7%) vs. 15 (47%) OR (95% CI) 0.37 (0.17–0.77), p = 0.006]. The duration of rupture of membranes was negatively associated with TOLAC success. Neonatal and maternal adverse outcomes did not differ between study groups. In multivariable logistic regression analysis, only the duration of rupture of membranes and modified Bishop score < 4 were independently associated with TOLAC success [adjusted OR (95% CI) 0.98 (0.96–0.99), p = 0.027 and 0.40 (0.16–0.97), p = 0.044].
Conclusion
TOLAC among GMP has a very-high success rate. Shortening the duration of ruptured membranes is a modifiable factor that may be associated with increased TOLAC success rates.
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Abbreviations
- CD:
-
Cesarean delivery
- GMP:
-
Grand multiparous
- TOLAC:
-
Trial of labor after cesarean
- VBAC:
-
Vaginal birth after cesarean
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All authors contributed to the manuscript. GL, RM and AT reviewed the literature and wrote the paper. NM, LT and MZ performed and collected the data. All authors read and approved the final manuscript.
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The study protocol was approved by the Sheba Medical Center review board (7145-20-SMC, 30/09/2020).
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Levin, G., Tsur, A., Tenenbaum, L. et al. Prediction of successful trial of labor after cesarean among grand-multiparous women. Arch Gynecol Obstet 306, 373–378 (2022). https://doi.org/10.1007/s00404-021-06311-4
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DOI: https://doi.org/10.1007/s00404-021-06311-4