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. 2024 Jan 31;24:95. doi: 10.1186/s12884-024-06278-5

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 3 — The CSA of Type I Pcm fibers was significantly lower in the 1 W, 2 W, and 4 W groups versus the sham group. The CSA of Type IIa and IIb fibers in the Pcm did not differ significantly between the four groups. The CSA of Type I fibers in the Icm fibers was significantly lower in the 1 W, 2 W, and 4 W groups versus the sham group. The CSA of Type IIa fibers in the Icm was significantly lower in the 1 W group versus the sham, 2 W, and 4 W groups (all p < 0.01). The CSA of Type IIb fibers in the Icm did not differ significantly among the four groups. CSA, cross-sectional area; Pcm, pubococcygeus muscle; Icm, iliococcygeus muscle; sham group, sham-operated group; 1 W group, 1 week after vaginal distention; 2 W group, 2 weeks after vaginal distention; 4 W group, 4 weeks after vaginal distention. Values are mean ± standard deviation. Statistical analysis ANOVA, Welch’s t-test and Steel–Dwass multiple comparison test. *Indicates a statistically significant difference (p < 0.05 versus the sham group); ‡Indicates a statistically significant difference (p < 0.01 versus the 1 W group)