{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T21:20:00Z","timestamp":1783459200035,"version":"3.55.0"},"reference-count":27,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2025,12,10]],"date-time":"2025-12-10T00:00:00Z","timestamp":1765324800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2025,12,10]],"date-time":"2025-12-10T00:00:00Z","timestamp":1765324800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100006095","name":"Helse S\u00f8r-\u00d8st RHF","doi-asserted-by":"publisher","award":["270926"],"award-info":[{"award-number":["270926"]}],"id":[{"id":"10.13039\/501100006095","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012446","name":"Akershus Universitetssykehus","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100012446","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Perineal tears are classified into four degrees based on severity. Second\u2010degree tears, which involve the muscles fusing into the perineal body, but not the anal sphincter, vary in extent and have recently been subcategorized. However, knowledge about their long\u2010term anatomical impact on the perineal body remains limited, as postpartum evaluation has largely relied on inspection and palpation. This study aimed to examine the association between the severity of perineal tears not affecting the anal sphincter, diagnosed at delivery, and deviations in the muscles fusing into the perineal body, assessed by three\u2010dimensional ultrasound 1\u2009year after vaginal delivery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Material and Methods<\/jats:title>\n                    <jats:p>This prospective cohort study included 384 primiparous women with vaginal deliveries at Akershus University Hospital, Norway, from January 2021 to July 2022. Perineal tears were classified and sutured according to international standards at delivery. In addition, second\u2010degree tears were subclassified according to the percentage of the perineal body damage (&lt;50%\u2009=\u20092A, \u226550%\u2009=\u20092B, entire perineal body without anal sphincter\u2009=\u20092C). Women with third\u2010 or fourth\u2010degree tears were excluded. One year after delivery, participants underwent three\u2010dimensional endovaginal and endoanal ultrasound examinations. The transverse perineal, puboperinealis, and puboanalis muscles were examined at their fusion into the perineal body. A deviation was defined as a muscle discontinuity or absence in at least one of the muscles.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The proportion of women with sonographically detected muscle deviations increased with tear severity: 22% for first\u2010degree (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200924), 52.7% for 2A (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200929), 60% for 2B (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200921) and 86.2% for 2C (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200925). Among women with episiotomies (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009126), 60.6% had one or more muscle deviations. A higher number of muscles were affected in the 2C tear group compared to 2B and 2A.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Sonographic deviations in the muscles fusing into the perineal body increase with the severity of perineal tears.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/aogs.70114","type":"journal-article","created":{"date-parts":[[2025,12,10]],"date-time":"2025-12-10T11:52:04Z","timestamp":1765367524000},"page":"1295-1302","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Severity of perineal tears and deviations in perineal body anatomy: A three\u2010dimensional ultrasound study"],"prefix":"10.1111","volume":"105","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3488-4150","authenticated-orcid":false,"given":"Hanne","family":"Sether Lilleberg","sequence":"first","affiliation":[{"name":"Department of Gynecology and Obstetrics Akershus University Hospital  L\u00f8renskog Norway"},{"name":"Faculty of Medicine University of Oslo  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Franziska","family":"Siafarikas","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics Akershus University Hospital  L\u00f8renskog Norway"},{"name":"Faculty of Medicine University of Oslo  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kari","family":"B\u00f8","sequence":"additional","affiliation":[{"name":"Department of Sports Medicine Norwegian School of Sports Sciences  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marie","family":"Ellstr\u00f6m Engh","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics Akershus University Hospital  L\u00f8renskog Norway"},{"name":"Faculty of Medicine University of Oslo  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,12,10]]},"reference":[{"key":"e_1_2_14_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2008.04.001"},{"key":"e_1_2_14_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/birt.12817"},{"key":"e_1_2_14_4_1","unstructured":"RCOG.The management of third\u2010 and fourth\u2010 degree perineal tears green\u2010top guideline no. 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