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BMC Pregnancy and Childbirth
Published in: BMC Pregnancy and Childbirth 1/2024

Open Access 01-12-2024 | Sectio Caesarea | Research

Association of the second birth mode of delivery and interval with maternal pelvic floor changes: a prospective cohort study

Authors: Xiaoli Wu, Xiu Zheng, Xiaohong Yi, Bolin Fan

Published in: BMC Pregnancy and Childbirth | Issue 1/2024

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Abstract

Background

This study aimed to explore the association of the second birth delivery mode and interval with maternal pelvic floor changes.

Methods

This prospective cohort study included women who had a first delivery and were in weeks 36–41 of a subsequent pregnancy at Panzhihua Central Hospital between July 2017 and June 2018. The primary outcomes of the study were the hiatus area at 6 months postpartum and bladder neck (mm) at rest and during a maximum Valsalva maneuver.

Results

There were 112 women with vaginal delivery and 182 with Cesarean section. The hiatus area and hiatus circumference decreased at all time points (all P < 0.001). The women with Cesarean section had a smaller hiatus area and circumference (P < 0.001 and P < 0.001). The hiatus diameters decreased with time in both groups (all P < 0.001) and were smaller after Cesarean section (both P < 0.001). The bladder neck at maximum Valsalva increased with time (all P < 0.001) without significant differences between the two groups. Finally, the proportion of patients with POP-Q stage 0/I increased with time in both groups (all P < 0.001), with the proportions being higher in the Cesarean group (P = 0.002). The birth interval was negatively correlated with the hiatus area (B=-0.17, 95%CI: -0.25, -0.08, P < 0.001) and positively correlated with the bladder neck at rest (B = 0.22, 95%CI: 0.08, 0.35, P = 0.001) and at maximum Valsalva (B = 0.85, 95%CI: 0.65, 1.05, P < 0.001).

Conclusions

In conclusion, the mode of delivery at the second birth could influence the hiatus area and circumference and bladder neck size. The birth interval was negatively correlated with the hiatus area and positively correlated with the bladder neck at rest and at maximum Valsalva.
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Metadata
Title
Association of the second birth mode of delivery and interval with maternal pelvic floor changes: a prospective cohort study
Authors
Xiaoli Wu
Xiu Zheng
Xiaohong Yi
Bolin Fan
Publication date
01-12-2024
Publisher
BioMed Central
Published in
BMC Pregnancy and Childbirth / Issue 1/2024
Electronic ISSN: 1471-2393
DOI
https://doi.org/10.1186/s12884-024-06366-6

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