{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T19:57:51Z","timestamp":1790798271504,"version":"4.1.0"},"reference-count":30,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2023,12,2]],"date-time":"2023-12-02T00:00:00Z","timestamp":1701475200000},"content-version":"vor","delay-in-days":1,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2023,12,1]],"date-time":"2023-12-01T00:00:00Z","timestamp":1701388800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2023,12]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objectives<\/jats:title>\n To determine the accuracy of sonographic fetal weight estimation in predicting birth weight (BW) and BW discordance in twin gestations, and to evaluate maternal and fetal characteristics that may affect the accuracy of this assessment.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n This was a retrospective cohort study of all twins delivered at a single tertiary medical center between 2010 and 2021. Twin gestations for which sonographic estimation of fetal weight was performed within the week preceding delivery were included. Statistical analysis was performed to evaluate the strength of the correlation between sonographic estimated fetal weight (EFW) and BW, and to determine the impact of maternal and fetal factors on the accuracy of sonographic estimation.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n The study included 2154 twin pregnancies. There was a strong correlation between sonographic EFW and corresponding BW for all twins (\n r<\/jats:italic>\n \u2009=\u20090.922;\n P<\/jats:italic>\n \u2009<\u20090.001). Strong correlations were observed for both the presenting and non\u2010presenting cotwin (\n r<\/jats:italic>\n \u2009=\u20090.921 and\n r<\/jats:italic>\n \u2009=\u20090.922, respectively; both\n P<\/jats:italic>\n \u2009<\u20090.001), as well as the larger and smaller cotwin (\n r<\/jats:italic>\n \u2009=\u20090.928 and\n r<\/jats:italic>\n \u2009=\u20090.934, respectively; both\n P<\/jats:italic>\n \u2009<\u20090.001). The overall mean\u2009\u00b1\u2009SD absolute error of sonographic EFW was 7.41\u2009\u00b1\u20096.81%. This error was greater for the non\u2010presenting cotwin compared with the presenting cotwin (7.99\u2009\u00b1\u20096.12%\n vs<\/jats:italic>\n 7.17\u2009\u00b1\u20095.64%;\n P<\/jats:italic>\n \u2009<\u20090.001), and for the smaller cotwin compared with the larger cotwin (8.56\u2009\u00b1\u20097.50%\n vs<\/jats:italic>\n 6.58\u2009\u00b1\u20095.47%;\n P<\/jats:italic>\n \u2009<\u20090.001). Advanced gestational age at scanning was correlated inversely with the mean absolute error of sonographic EFW. Multivariate logistic regression indicated that an earlier gestational age at scanning, being the non\u2010presenting cotwin and being the smaller cotwin were independent risk factors for sonographic EFW inaccuracy. Pregnancies in which the presenting twin was estimated to be the smaller cotwin had twice the rate of false\u2010positive BW discordance compared with pregnancies in which the presenting twin was estimated to be the larger cotwin (36.0%\n vs<\/jats:italic>\n 13.0% for BW discordance >\u200915%, 35.0%\n vs<\/jats:italic>\n 17.0% for BW discordance >\u200920% and 37.7%\n vs<\/jats:italic>\n 12.1% for BW discordance >\u200925%; all\n P<\/jats:italic>\n \u2009<\u20090.001). The error in sonographic EFW discordance was not related to chorionicity, the position of the presenting fetus or gestational age at the time of fetal weight estimation.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n \n Sonographic estimation of fetal weight within 7\u2009days before delivery accurately predicts BW in twin pregnancy. Sonographic EFW accuracy is reduced for the non\u2010presenting twin, the smaller cotwin and when delivery occurs at an earlier gestational age. Sonographic estimation of fetal weight discordance is less accurate when the presenting twin is the smaller cotwin. \u00a9 2023 The Authors.\n Ultrasound in Obstetrics & Gynecology<\/jats:italic>\n published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.\n <\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/uog.26277","type":"journal-article","created":{"date-parts":[[2023,6,2]],"date-time":"2023-06-02T10:38:26Z","timestamp":1685702306000},"page":"821-828","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Accuracy of sonographic fetal weight estimation and prediction of birth\u2010weight discordance in twin pregnancy: large single\u2010center study"],"prefix":"10.1002","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0374-9637","authenticated-orcid":false,"given":"H.","family":"Rosen","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Mayanei Hayeshua Medical Center Bnei Brak Israel"},{"name":"Sackler Faculty of Medicine Tel Aviv University Tel Aviv Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Y.","family":"Gold\u2010Zamir","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Mayanei Hayeshua Medical Center Bnei Brak Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Lopian","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Mayanei Hayeshua Medical Center Bnei Brak Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5558-7871","authenticated-orcid":false,"given":"T.","family":"Weissbach","sequence":"additional","affiliation":[{"name":"Sackler Faculty of Medicine Tel Aviv University Tel Aviv Israel"},{"name":"Institute of Obstetrical and Gynecological Imaging, Department of Obstetrics and Gynecology Sheba Medical Center Tel Hashomer Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.","family":"Kassif","sequence":"additional","affiliation":[{"name":"Sackler Faculty of Medicine Tel Aviv University Tel Aviv Israel"},{"name":"Institute of Obstetrical and Gynecological Imaging, Department of Obstetrics and Gynecology Sheba Medical Center Tel Hashomer Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.","family":"Weisz","sequence":"additional","affiliation":[{"name":"Sackler Faculty of Medicine Tel Aviv University Tel Aviv Israel"},{"name":"Institute of Obstetrical and Gynecological Imaging, Department of Obstetrics and Gynecology Sheba Medical Center Tel Hashomer Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,12,2]]},"reference":[{"issue":"187","key":"e_1_2_7_2_1","first-page":"e1","article-title":"Patterns of discordant growth and adverse neonatal outcomes in 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