{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,8]],"date-time":"2026-08-08T06:43:45Z","timestamp":1786171425493,"version":"build-2736575974"},"reference-count":12,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T00:00:00Z","timestamp":1780963200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T00:00:00Z","timestamp":1780963200000},"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":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2026,9]]},"abstract":"Abstract<\/jats:title>\n \n Introduction<\/jats:title>\n Accurate ultrasound estimated fetal weight (EFW) supports key perinatal decisions. This study aimed to compare the accuracy of a population\u2010specific formula with that of a widely used global model in pregnancies examined near delivery.<\/jats:p>\n <\/jats:sec>\n \n Material and Methods<\/jats:title>\n This was a secondary analysis of a prospective Japanese cohort study to develop a new fetal ultrasound biometry reference chart. Fetal ultrasound measurements were obtained by Japan Society of Ultrasonics in Medicine\u2010certified sonographers or under their supervision and submitted to the coordinating center, where EFW was calculated using the Shinozuka and Hadlock\u20103 formulas. Analyses were restricted to cases with EFW available from both formulas. The primary analysis included examinations within 7\u2009days before delivery; a sensitivity analysis restricted the interval to \u22643\u2009days. A subgroup analysis was performed in fetuses classified as small for gestational age (SGA).<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n In the primary analysis (\n n<\/jats:italic>\n \u2009=\u2009310), the median signed error was \u221275.8\u2009g for Shinozuka and \u2212223.3\u2009g for Hadlock\u20103 (Wilcoxon\n p<\/jats:italic>\n \u2009<\u20090.001). The median absolute percentage signed error was 4.81% for Shinozuka and 7.93% for Hadlock\u20103 (Wilcoxon\n p<\/jats:italic>\n \u2009<\u20090.001). The proportion within \u00b110% of BW was 83.9% with Shinozuka versus 61.6% with Hadlock\u20103 (McNemar\n p<\/jats:italic>\n \u2009<\u20090.001). In the sensitivity analysis (\n n<\/jats:italic>\n \u2009=\u2009176), similar findings were observed. In the SGA subgroup (\n n<\/jats:italic>\n \u2009=\u200940), the signed error and absolute percentage error were significantly lower with the Shinozuka formula than with Hadlock\u20103.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n In this multicenter cohort examined near delivery, the population\u2010specific Shinozuka formula produced EFW closer to BW and a higher proportion within \u00b110% than Hadlock\u20103, which showed greater systematic underestimation. These findings support the use of locally validated, population\u2010specific EFW formulas when available, particularly for clinical decision\u2010making near delivery.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/aogs.70278","type":"journal-article","created":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T05:48:56Z","timestamp":1781070536000},"page":"1680-1688","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Population\u2010specific validation of fetal weight formulas: Evidence from a multicenter near\u2010delivery cohort"],"prefix":"10.1111","volume":"105","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3007-5295","authenticated-orcid":false,"given":"Sumito","family":"Nagasaki","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-4791-8206","authenticated-orcid":false,"given":"Rio","family":"Suzuki","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-6181-936X","authenticated-orcid":false,"given":"Fumio","family":"Sugo","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-7123-307X","authenticated-orcid":false,"given":"Mayu","family":"Tachihara","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-0810-2047","authenticated-orcid":false,"given":"Tsubasa","family":"Mori","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-2559-3534","authenticated-orcid":false,"given":"Sena","family":"Shimizu","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4683-7757","authenticated-orcid":false,"given":"Junya","family":"Sakuma","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9102-2322","authenticated-orcid":false,"given":"Ayumu","family":"Ito","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0512-1173","authenticated-orcid":false,"given":"Mayumi","family":"Takano","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3621-1251","authenticated-orcid":false,"given":"Masahiko","family":"Nakata","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Toho University Omori Medical Center Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,6,9]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/ijgo.13522"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.1751"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.7863\/jum.2009.28.5.617"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9378(85)90298-4"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(87)80278-8"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1515\/JPM.2004.028"},{"key":"e_1_2_12_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/aogs.14554"},{"key":"e_1_2_12_9_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-963165"},{"key":"e_1_2_12_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s13224-025-02144-2"},{"key":"e_1_2_12_11_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-025-14508-9"},{"issue":"5","key":"e_1_2_12_12_1","first-page":"815","article-title":"Assessment of the accuracy of multiple sonographic fetal weight estimation formulas: a 10\u2010year experience from a single center","volume":"32","author":"Barel O","year":"2013","journal-title":"J Ultrasound Med"},{"key":"e_1_2_12_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.19066"}],"container-title":["Acta Obstetricia et Gynecologica Scandinavica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/aogs.70278","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/aogs.70278","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/aogs.70278","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,8]],"date-time":"2026-08-08T06:05:27Z","timestamp":1786169127000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/aogs.70278"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,9]]},"references-count":12,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2026,9]]}},"alternative-id":["10.1111\/aogs.70278"],"URL":"https:\/\/doi.org\/10.1111\/aogs.70278","archive":["Portico"],"relation":{},"ISSN":["0001-6349","1600-0412"],"issn-type":[{"value":"0001-6349","type":"print"},{"value":"1600-0412","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,6,9]]},"assertion":[{"value":"2026-02-25","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-05-25","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-06-09","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}