{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T16:41:37Z","timestamp":1785775297842,"version":"3.56.0"},"reference-count":23,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2012,2,27]],"date-time":"2012-02-27T00:00:00Z","timestamp":1330300800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2012,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To study intraobserver repeatability and intermethod agreement between two\u2010 (2D) and three\u2010dimensional (3D) transperineal ultrasound methods in assessing fetal head descent during the first stage of labor.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Fetal head descent was measured with transperineal ultrasound as the fetal head\u2013perineum distance and the angle of progression in 106 primiparous women with prolonged first stage of labor. A single obstetrician performed all the scans, and another obstetrician analyzed the acquired 2D images and 3D volumes, blinded to clinical assessments and labor outcome. Intraobserver repeatability and intermethod agreement between 2D and 3D methods were analyzed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The repeatability coefficient was \u00b1 4.1 mm in 2D acquisitions and \u00b1 1.7 mm in 3D acquisitions of fetal head\u2013perineum distance. The intraclass correlation coefficients (ICC) were 0.94 for 2D and 0.99 for 3D measurements. The angle of progression repeatability coefficients were \u00b1 6.7\u00b0 using 2D and \u00b1 5.7\u00b0 using 3D ultrasound and ICCs were 0.91 and 0.94, respectively. The intermethod ICC for fetal head\u2013perineum distance in 2D vs 3D acquisitions was 0.95 and for angle of progression it was 0.93; the intermethod 95% limits of agreement were \u2212 5.8 mm to + 7.2 mm and \u2212 8.9\u00b0 to + 13.7\u00b0, respectively. Cohen's kappa for 2D vs 3D acquisitions was 0.85 using 40 mm as a cut\u2010off level for fetal head\u2013perineum distance and 0.79 using 110\u00b0 as cut\u2010off level for angle of progression.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>For one ultrasound operator the intraobserver repeatability and agreement between 2D and 3D ultrasound methods in prolonged first stage of labor were good. Given that 2D methods are simpler to learn and can be analyzed quickly online, 2D equipment might therefore be preferred in the labor room. Copyright \u00a9 2012 ISUOG. Published by John Wiley &amp; Sons, Ltd.<\/jats:p><\/jats:sec>","DOI":"10.1002\/uog.9065","type":"journal-article","created":{"date-parts":[[2011,5,31]],"date-time":"2011-05-31T12:04:22Z","timestamp":1306843462000},"page":"310-315","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Agreement between two\u2010 and three\u2010dimensional transperineal ultrasound methods in assessing fetal head descent in the first stage of labor"],"prefix":"10.1002","volume":"39","author":[{"given":"E. A.","family":"Torkildsen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K. \u00c5.","family":"Salvesen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T. M.","family":"Eggeb\u00f8","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2012,2,27]]},"reference":[{"key":"e_1_2_5_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.1064"},{"key":"e_1_2_5_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.103"},{"key":"e_1_2_5_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.1065"},{"key":"e_1_2_5_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.5323"},{"key":"e_1_2_5_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2007.04.050"},{"key":"e_1_2_5_7_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.2002.00765.x"},{"key":"e_1_2_5_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.2731"},{"key":"e_1_2_5_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.2744"},{"key":"e_1_2_5_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.5360"},{"key":"e_1_2_5_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.3848"},{"key":"e_1_2_5_12_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.6294"},{"key":"e_1_2_5_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.6329"},{"key":"e_1_2_5_14_2","doi-asserted-by":"publisher","DOI":"10.1159\/000287588"},{"key":"e_1_2_5_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.1765"},{"key":"e_1_2_5_16_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.7521"},{"key":"e_1_2_5_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.7709"},{"key":"e_1_2_5_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.8951"},{"key":"e_1_2_5_19_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.7752"},{"key":"e_1_2_5_20_2","unstructured":"World Health Organization. Department of Reproductive Health and Research.Managing complications in pregnancy and childbirth: a guide for midwives and doctors 2003. WHO\/RHR\/007.http:\/\/www.who.int\/reproductive\u2010health\/impac\/mcpc.pdf[Accessed Sep 9th 2010]."},{"key":"e_1_2_5_21_2","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.4.5833.163"},{"key":"e_1_2_5_22_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.122"},{"key":"e_1_2_5_23_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.6322"},{"key":"e_1_2_5_24_2","doi-asserted-by":"publisher","DOI":"10.3109\/14767050903353224"}],"container-title":["Ultrasound in Obstetrics &amp; Gynecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fuog.9065","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/uog.9065","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,8]],"date-time":"2023-10-08T04:09:51Z","timestamp":1696738191000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1002\/uog.9065"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,2,27]]},"references-count":23,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2012,3]]}},"alternative-id":["10.1002\/uog.9065"],"URL":"https:\/\/doi.org\/10.1002\/uog.9065","archive":["Portico"],"relation":{},"ISSN":["0960-7692","1469-0705"],"issn-type":[{"value":"0960-7692","type":"print"},{"value":"1469-0705","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,2,27]]},"assertion":[{"value":"2011-05-16","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2012-02-27","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}