{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,24]],"date-time":"2026-01-24T08:34:30Z","timestamp":1769243670207,"version":"3.49.0"},"reference-count":51,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2020,3,2]],"date-time":"2020-03-02T00:00:00Z","timestamp":1583107200000},"content-version":"vor","delay-in-days":1,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100003123","name":"Fetal Medicine Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003123","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2020,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>First, to compare the manual sagittal and parasagittal and automated parasagittal methods of measuring the angle of progression (AoP) by transperineal ultrasound during labor, and, second, to develop models for the prediction of time to delivery and need for Cesarean section (CS) for failure to progress (FTP) in a population of patients undergoing induction of labor.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This was a prospective observational study of transperineal ultrasound in a cohort of 512 women with a singleton pregnancy undergoing induction of labor. A random selection of 50 stored images was assessed for inter\u2010 and intraobserver reliability of AoP measurements using the manual sagittal and parasagittal and automated parasagittal methods. In cases of vaginal delivery, univariate linear, multiple linear and quantile regression analyses were performed to predict time to delivery. Univariate and multivariate binomial logistic regression analyses were performed to predict CS for FTP in the first stage of labor.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The intraclass correlation coefficient (ICC) for the manual parasagittal method for a single observer was 0.97 (95%\u2009CI, 0.95\u20130.98) and for two observers it was 0.96 (95%\u2009CI, 0.93\u20130.98), indicating good reliability. The ICC for the sagittal method for a single observer was 0.93 (95%\u2009CI, 0.88\u20130.96) and for two observers it was 0.74 (95%\u2009CI, 0.58\u20130.84), indicating moderate reliability for a single observer and poor reliability between two observers. Bland\u2013Altman analysis demonstrated narrower limits of agreement for the manual parasagittal approach than for the sagittal approach for both a single and two observers. The automated parasagittal method failed to capture an image in 19% of cases. The mean difference in AoP measurements between the sagittal and manual parasagittal methods was 11\u00b0. In pregnancies resulting in vaginal delivery, 54% of the variation in time to delivery was explained in a model combining parity, epidural and syntocinon use during labor and the sonographic findings of fetal head position and AoP. In the prediction of CS for FTP in the first stage of labor, a model which combined maternal factors with the sonographic measurements of AoP and estimated fetal weight was superior to one utilizing maternal factors alone (area under the receiver\u2010operating\u2010characteristics curve, 0.80 <jats:italic>vs<\/jats:italic> 0.76).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>First, the method of measuring AoP with the greatest reliability is the manual parasagittal technique and future research should focus on this technique. Second, over half of the variation in time to vaginal delivery can be explained by a model that combines maternal factors, pregnancy characteristics and ultrasound findings. Third, the ability of AoP to provide clinically useful prediction of CS for FTP in the first stage of labor is limited. Copyright \u00a9 2019 ISUOG. Published by John Wiley &amp; Sons Ltd.<\/jats:p><\/jats:sec>","DOI":"10.1002\/uog.21913","type":"journal-article","created":{"date-parts":[[2019,11,6]],"date-time":"2019-11-06T12:39:52Z","timestamp":1573043992000},"page":"391-400","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Comparison of different methods of measuring angle of progression in prediction of labor outcome"],"prefix":"10.1002","volume":"55","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8013-3679","authenticated-orcid":false,"given":"A.","family":"Frick","sequence":"first","affiliation":[{"name":"Harris Birthright Research Centre for Fetal Medicine, King's College Hospital  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"V.","family":"Kostiv","sequence":"additional","affiliation":[{"name":"Harris Birthright Research Centre for Fetal Medicine, King's College Hospital  London UK"},{"name":"Fetal Medicine Unit, Medway Maritime Hospital  Gillingham UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D.","family":"Vojtassakova","sequence":"additional","affiliation":[{"name":"Harris Birthright Research Centre for Fetal Medicine, King's College Hospital  London UK"},{"name":"Fetal Medicine Unit, Medway Maritime Hospital  Gillingham UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7265-5442","authenticated-orcid":false,"given":"R.","family":"Akolekar","sequence":"additional","affiliation":[{"name":"Fetal Medicine Unit, Medway Maritime Hospital  Gillingham UK"},{"name":"Institute of Medical Sciences, Canterbury Christ Church University  Chatham UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K. H.","family":"Nicolaides","sequence":"additional","affiliation":[{"name":"Harris Birthright Research Centre for Fetal Medicine, King's College Hospital  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,3,2]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(54)90311-7"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1097\/00006250-195512000-00001"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/00006250-195612000-00007"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1515\/jpm-2017-0018"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2007.01386.x"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2004.09.028"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1186\/1742-4755-9-16"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.3109\/14767058.2014.958459"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(97)70007-3"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1155\/S1064744995000457"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/14651858.CD010088.pub2"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.2744"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.6329"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00404-015-3769-z"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.15994"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/ajo.12864"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.7709"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2010.02775.x"},{"key":"e_1_2_7_20_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.7752"},{"key":"e_1_2_7_21_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.12335"},{"key":"e_1_2_7_22_1","doi-asserted-by":"publisher","DOI":"10.1080\/01443615.2017.1354179"},{"key":"e_1_2_7_23_1","doi-asserted-by":"publisher","DOI":"10.1080\/14767058.2016.1277701"},{"key":"e_1_2_7_24_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.19072"},{"key":"e_1_2_7_25_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.6294"},{"key":"e_1_2_7_26_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.7521"},{"key":"e_1_2_7_27_1","doi-asserted-by":"publisher","DOI":"10.1080\/14767058.2017.1369946"},{"key":"e_1_2_7_28_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.13210"},{"key":"e_1_2_7_29_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.8951"},{"key":"e_1_2_7_30_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.12267"},{"key":"e_1_2_7_31_1","doi-asserted-by":"publisher","DOI":"10.1159\/000448947"},{"key":"e_1_2_7_32_1","volume-title":"Intrapartum care for healthy women and babies","author":"National Institute for Health and Care Excellence","year":"2014"},{"key":"e_1_2_7_33_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.1994.04010034.x"},{"key":"e_1_2_7_34_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(85)90298-4"},{"key":"e_1_2_7_35_1","doi-asserted-by":"publisher","DOI":"10.1080\/jmf.12.3.172.177"},{"key":"e_1_2_7_36_1","doi-asserted-by":"publisher","DOI":"10.1037\/0033-2909.86.2.420"},{"key":"e_1_2_7_37_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.13320"},{"key":"e_1_2_7_38_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(86)90837-8"},{"key":"e_1_2_7_39_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511754098"},{"key":"e_1_2_7_40_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.12422"},{"key":"e_1_2_7_41_1","first-page":"135","article-title":"Prolonged latent phase in the nullipara","volume":"17","author":"Friedman EA","year":"1961","journal-title":"Obstet Gynecol"},{"key":"e_1_2_7_42_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.0730-7659.2006.00069.x"},{"key":"e_1_2_7_43_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-1004827"},{"key":"e_1_2_7_44_1","doi-asserted-by":"publisher","DOI":"10.3109\/00016348809004182"},{"key":"e_1_2_7_45_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884-017-1345-1"},{"key":"e_1_2_7_46_1","first-page":"35","article-title":"Time remaining in labor and probability of vaginal delivery as a function of the angle of progression in a low risk population with a normal first stage of labor. In\u2010house observational study and comparison with the data in the literature","volume":"70","author":"Masturzo B","year":"2018","journal-title":"Minerva Ginecol"},{"key":"e_1_2_7_47_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa1800566"},{"key":"e_1_2_7_48_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.20140"},{"key":"e_1_2_7_49_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.14951"},{"key":"e_1_2_7_50_1","doi-asserted-by":"publisher","DOI":"10.1111\/aogs.13230"},{"key":"e_1_2_7_51_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-0037-1608633"},{"key":"e_1_2_7_52_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.12379"}],"container-title":["Ultrasound in Obstetrics &amp; Gynecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/uog.21913","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/uog.21913","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/uog.21913","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,9,6]],"date-time":"2023-09-06T22:00:47Z","timestamp":1694037647000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1002\/uog.21913"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,3]]},"references-count":51,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2020,3]]}},"alternative-id":["10.1002\/uog.21913"],"URL":"https:\/\/doi.org\/10.1002\/uog.21913","archive":["Portico"],"relation":{},"ISSN":["0960-7692","1469-0705"],"issn-type":[{"value":"0960-7692","type":"print"},{"value":"1469-0705","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,3]]},"assertion":[{"value":"2019-10-01","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2019-10-24","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2020-03-02","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}