Abstract
Introduction and hypothesis
To evaluate the effect of the second stage of labor (SSL) lasting > 2 h on pelvic floor function.
Methods
This single-center prospective cohort study included primiparous women with SSL > 2 h treated at Tongji Hospital between January 2018 and December 2019 (case group). A matched group of women with similar newborn weight and SSL < 2 h were recruited simultaneously (control group). Stress urinary incontinence (SUI) and pelvic floor muscle (PFM) characteristics were measured at 6 weeks, 6 months, and finally 1 year postpartum.
Results
A total of 63 pairs of primiparous women completed 1-year follow-up. The incidence of SUI in the case group was significantly higher than that in the control group at 6 weeks postpartum (P = 0.020); however, the differences were not significant at 1 year postpartum (P=1.00). PFM endurance was significantly lower in the case group at 6 weeks (P = 0.000), 6 months (P = 0.000), and 1 year (P = 0.011) after childbirth. There was no difference in PFM strength between the two groups. The maximal voluntary contraction (MVC) of PFM was significantly lower in the case group at 6 weeks postpartum (P = 0.007), but the differences were not significant at 1 year postpartum (P = 0.197). PFM endurance and MVC were higher at 1 year than at 6 weeks postpartum in both groups.
Conclusions
The SSL > 2 h increased the incidence of SUI at 6 weeks postpartum and decreased PFM endurance for 1 year.
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Acknowledgements
We are grateful for the support of several clinicians and midwives of Tongji Hospital for their help with patient recruitment.
Funding
This study was funded by Traditional Chinese Medicine for Maternal and Child Health Project of Shanghai, the National Natural Science Foundation of China (No. 81873827);Shanghai Municipal Health Commission Project (No. 201840304).
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L Chu: Project development
HF Li: Project development
X Jin: Data collection
SY Wu: Data collection
J Huang: Data collection
L Chu: Management of data analysis
X Jin: Management of data analysis
L Chu: Manuscript writing
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The study protocol was approved by the Ethics Committee of Tongji Hospital, Tongji University School of Medicine. Ethics Approval Number: KYSB-2018-13
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Jin, X., Wu, S., Huang, J. et al. Effect of prolonged second stage of labor on pelvic floor function: A prospective cohort study. Int Urogynecol J 33, 1633–1638 (2022). https://doi.org/10.1007/s00192-022-05136-2
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DOI: https://doi.org/10.1007/s00192-022-05136-2