Haylen BT, de Ridder D, Freeman RM, Swift SE, Berghmans B, Lee J, et al. An International Urogynecological Association (IUGA)/International Continence Society (ICS) joint report on the terminology for female pelvic floor dysfunction. Neurourol Urodyn. 2010;29(1):4–20. https://doi.org/10.1002/nau.20798.

Article  PubMed  Google Scholar 

DeLancey JOL. The hidden epidemic of pelvic floor dysfunction: achievable goals for improved prevention and treatment. Am J Obstet Gynecol. 2005;192(5):1488–95. https://doi.org/10.1016/j.ajog.2005.02.028.

Article  PubMed  Google Scholar 

MacArthur C, Wilson D, Herbison P, Lancashire RJ, Hagen S, Toozs-Hobson P, et al. Urinary incontinence persisting after childbirth: extent, delivery history, and effects in a 12-year longitudinal cohort study. BJOG. 2016;123(6):1022–9. https://doi.org/10.1111/1471-0528.13395.

Article  CAS  PubMed  Google Scholar 

Bols EMJ, Hendriks EJM, Berghmans BCM, Baeten CGMI, Nijhuis JG, De Bie RA. A systematic review of etiological factors for postpartum fecal incontinence. Acta Obstet Gynecol Scand. 2010;89(3):302–14. https://doi.org/10.3109/00016340903576004.

Article  PubMed  Google Scholar 

Borello-France D, Burgio KL, Richter HE, Zyczynski H, Fitzgerald MP, Whitehead W, et al. Fecal and urinary incontinence in primiparous women. Obstet Gynecol. 2006;108(4):863–72. https://doi.org/10.1097/01.AOG.0000232504.32589.3b.

Article  PubMed  Google Scholar 

Sultan AH, Monga A, Lee J, Emmanuel A, Norton C, Santoro G, et al. An International Urogynecological Association (IUGA)/International Continence Society (ICS) joint report on the terminology for female anorectal dysfunction. Int Urogynecol J. 2017;28(1):5–31. https://doi.org/10.1007/s00192-016-3140-3.

Article  PubMed  Google Scholar 

Trzpis M, Sun G, Chen J-H, Huizinga JD, Broens P. Novel insights into physiological mechanisms underlying fecal continence. Am J Physiol Gastrointest Liver Physiol. 2023;324(1):G1–9. https://doi.org/10.1152/ajpgi.00313.2021.

Article  CAS  PubMed  Google Scholar 

Ashton-Miller JA, DeLancey JOL. Functional anatomy of the female pelvic floor. Ann N Y Acad Sci. 2007;1101(1):266–96. https://doi.org/10.1196/annals.1389.034.

Article  PubMed  Google Scholar 

Gowda SN, Bordoni B. Anatomy, abdomen and pelvis: levator ani muscle. In: StatPearls. Treasure Island (FL): StatPearls; 2024.

Google Scholar 

Kearney R, Sawhney R, DeLancey JOL. Levator ani muscle anatomy evaluated by origin-insertion pairs. Obstet Gynecol. 2004;104(1):168–73. https://doi.org/10.1097/01.AOG.0000128906.61529.6b.

Article  PubMed  PubMed Central  Google Scholar 

Sindhwani N, Bamberg C, Famaey N, Callewaert G, Dudenhausen JW, Teichgräber U, Deprest J. In vivo evidence of significant levator ani muscle stretch on MR images of a live childbirth. Am J Obstet Gynecol. 2017;217(2):194.e1–8. https://doi.org/10.1016/j.ajog.2017.04.014.

Article  PubMed  Google Scholar 

Kim J, Betschart C, Ramanah R, Ashton-Miller JA, DeLancey JOL. Anatomy of the pubovisceral muscle origin: macroscopic and microscopic findings within the injury zone. Neurourol Urodyn. 2015;34(8):774–80. https://doi.org/10.1002/nau.22649.

Article  PubMed  Google Scholar 

Kubotani J, Araujo E, de Queiroz Campos A, Passos J, do Nascimento Neri C, Diniz Zanetti M. Physiotherapeutic treatment for levator ani avulsion after delivery: a transperineal three-dimensional ultrasound assessment. J Med Ultrasound. 2020;28(4):245. https://doi.org/10.4103/JMU.JMU_43_20.

Article  PubMed  PubMed Central  Google Scholar 

Dietz HP, Shek C. Validity and reproducibility of the digital detection of levator trauma. Int Urogynecol J Pelvic Floor Dysfunct. 2008;19(8):1097–101. https://doi.org/10.1007/s00192-008-0575-1.

Article  CAS  PubMed  Google Scholar 

Dietz HP. Ultrasound imaging of the pelvic floor. II. Three-dimensional or volume imaging. Ultrasound Obstet Gynecol. 2004;23(6):615–25. https://doi.org/10.1002/uog.1072.

Article  CAS  PubMed  Google Scholar 

Blasi I, Fuchs I, D'Amico R, Vinci V, La Sala GB, Mazza V, Henrich W. Intrapartum translabial three-dimensional ultrasound visualization of levator trauma. Ultrasound Obstet Gynecol. 2011;37(1):88–92. https://doi.org/10.1002/uog.8818.

Article  CAS  PubMed  Google Scholar 

Dietz HP, Lanzarone V. Levator trauma after vaginal delivery. Obstet Gynecol. 2005;106(4):707–12. https://doi.org/10.1097/01.AOG.0000178779.62181.01.

Article  PubMed  Google Scholar 

Valsky DV, Lipschuetz M, Bord A, Eldar I, Messing B, Hochner-Celnikier D, et al. Fetal head circumference and length of second stage of labor are risk factors for levator ani muscle injury, diagnosed by 3-dimensional transperineal ultrasound in primiparous women. Am J Obstet Gynecol. 2009;201(1):91.e1–7. https://doi.org/10.1016/j.ajog.2009.03.028.

Article  PubMed  Google Scholar 

Schwertner-Tiepelmann N, Thakar R, Sultan AH, Tunn R. Obstetric levator ani muscle injuries: current status. Ultrasound Obstet Gynecol. 2012;39(4):372–83. https://doi.org/10.1002/uog.11080.

Article  CAS  PubMed  Google Scholar 

Shek K, Dietz H. Intrapartum risk factors for levator trauma. BJOG. 2010;117(12):1485–92. https://doi.org/10.1111/j.1471-0528.2010.02704.x.

Article  CAS  PubMed  Google Scholar 

Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, et al. The PRISMA 2020 statement: an updated guideline for reporting systematic reviews. BMJ. 2021;372:n71. https://doi.org/10.1136/bmj.n71.

Article  PubMed  PubMed Central  Google Scholar 

Methley AM, Campbell S, Chew-Graham C, McNally R, Cheraghi-Sohi S. PICO, PICOS and SPIDER: a comparison study of specificity and sensitivity in three search tools for qualitative systematic reviews. BMC Health Serv Res. 2014;14:579. https://doi.org/10.1186/s12913-014-0579-0.

Article  PubMed  PubMed Central  Google Scholar 

Hayden JA, van der Windt DA, Cartwright JL, Côté P, Bombardier C. Assessing bias in studies of prognostic factors. Ann Intern Med. 2013;158(4):280. https://doi.org/10.7326/0003-4819-158-4-201302190-00009.

Article  PubMed  Google Scholar 

Riley RD, Moons KGM, Snell KIE, Ensor J, Hooft L, Altman DG, et al. A guide to systematic review and meta-analysis of prognostic factor studies. BMJ. 2019;364:k4597. https://doi.org/10.1136/bmj.k4597.

Article  PubMed  Google Scholar 

Richter HE, Nager CW, Burgio KL, Whitworth R, Weidner AC, Schaffer J, et al. Incidence and predictors of anal incontinence after obstetric anal sphincter injury in primiparous women. Female Pelvic Med Reconstr Surg. 2015;21(4):182–9. https://doi.org/10.1097/SPV.0000000000000160.

Article  PubMed  PubMed Central  Google Scholar 

Okeahialam NA, Taithongchai A, Thakar R, Sultan AH. The incidence of anal incontinence following obstetric anal sphincter injury graded using the Sultan classification: a network meta-analysis. Am J Obstet Gynecol. 2023;228(6):675–88.e13. https://doi.org/10.1016/j.ajog.2022.11.1279.

Article  PubMed  Google Scholar 

Fincham JE. Response rates and responsiveness for surveys, standards, and the journal. Am J Pharm Educ. 2008;72(2):43. https://doi.org/10.5688/aj720243.

Article  PubMed  PubMed Central  Google Scholar 

Grooten WJA, Tseli E, Äng BO, Boersma K, Stålnacke B-M, Gerdle B, Enthoven P. Elaborating on the assessment of the risk of bias in prognostic studies in pain rehabilitation using QUIPS—aspects of interrater agreement. Diagn Progn Res. 2019;3(1):5. https://doi.org/10.1186/s41512-019-0050-0.

Article  PubMed  PubMed Central  Google Scholar 

Chan SSC, Cheung RYK, Yiu KW, Lee LL, Chung TKH. Effect of levator ani muscle injury on primiparous women during the first year after childbirth. Int Urogynecol J. 2014;25(10):1381–8. https://doi.org/10.1007/s00192-014-2340-y.

Article  PubMed  Google Scholar 

Chung MY, Wan OYK, Cheung RYK, Chung TKH, Chan SSC. Prevalence of levator ani muscle injury and health-related quality of life in primiparous Chinese women after instrumental delivery. Ultrasound Obstet Gynecol. 2015;45(6):728–33. https://doi.org/10.1002/uog.14700.

Article