{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,6]],"date-time":"2026-11-06T23:45:53Z","timestamp":1794008753201,"version":"4.8.0"},"reference-count":7,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2003,12,22]],"date-time":"2003-12-22T00:00:00Z","timestamp":1072051200000},"content-version":"vor","delay-in-days":569,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["BJOG"],"published-print":{"date-parts":[[2002,6]]},"abstract":"<jats:p>We compared rates of preterm and postterm birth according to six algorithms for gestational age (GA) estimates based on last menstrual period (LMP) and early ultrasound (EUS): LMP alone, LMP if the discrepancy between the two estimates was within 14 days and otherwise EUS (14\u2010day rule), a 10\u2010day rule, a seven\u2010day rule, a three\u2010day rule and EUS alone. In a sample of 44,623 births in a Canadian tertiary hospital, the choice of algorithms makes a substantial impact on both preterm and postterm birth rates, even when EUS was used for discrepancies over two weeks.<\/jats:p>","DOI":"10.1111\/j.1471-0528.2002.01068.x","type":"journal-article","created":{"date-parts":[[2003,12,22]],"date-time":"2003-12-22T16:09:31Z","timestamp":1072109371000},"page":"718-720","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":70,"title":["Algorithms for combining menstrual and ultrasound estimates of gestational age: consequences for rates of preterm and postterm birth"],"prefix":"10.1111","volume":"109","author":[{"given":"B\u00e9atrice","family":"Blondel","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabelle","family":"Morin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert W.","family":"Platt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael S.","family":"Kramer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Usher","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G\u00e9rard","family":"Br\u00e9art","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2003,12,22]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1988.03410220090034"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1067\/mob.2002.120487"},{"key":"e_1_2_6_4_2","first-page":"770","article-title":"La situation p\u00e9rinatale en France. Evolution entre 1981 et 1995","volume":"26","author":"Blondel B","year":"1997","journal-title":"J Gynecol Obstet Biol Reprod"},{"key":"e_1_2_6_5_2","unstructured":"Neilson JP. Ultrasound for fetal assessment in early pregnancy (Cochrane Review). In:The Cochrane Library Issue 3 Oxford: Update Software 2001."},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1998.tb10253.x"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1097\/00001648-199509000-00012"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1997.tb10965.x"}],"container-title":["BJOG: An International Journal of Obstetrics &amp; Gynaecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fj.1471-0528.2002.01068.x","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/j.1471-0528.2002.01068.x","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,17]],"date-time":"2023-10-17T20:54:18Z","timestamp":1697576058000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/j.1471-0528.2002.01068.x"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2002,6]]},"references-count":7,"aliases":["10.1016\/s1470-0328(02)01068-6"],"journal-issue":{"issue":"6","published-print":{"date-parts":[[2002,6]]}},"alternative-id":["10.1111\/j.1471-0528.2002.01068.x"],"URL":"https:\/\/doi.org\/10.1111\/j.1471-0528.2002.01068.x","archive":["Portico"],"relation":{},"ISSN":["1470-0328","1471-0528"],"issn-type":[{"value":"1470-0328","type":"print"},{"value":"1471-0528","type":"electronic"}],"subject":[],"published":{"date-parts":[[2002,6]]},"assertion":[{"value":"2003-12-22","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}