{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T17:30:53Z","timestamp":1761845453571,"version":"3.40.5"},"reference-count":30,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2021,11,8]],"date-time":"2021-11-08T00:00:00Z","timestamp":1636329600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["BJOG"],"published-print":{"date-parts":[[2022,4]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To investigate the risk of stillbirth or neonatal death before 45 post\u2010menstrual weeks in relation to gestational duration, stratified by body mass index (BMI) and parity.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>Retrospective study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>Data from the Swedish Medical Birth Register.<\/jats:p><\/jats:sec><jats:sec><jats:title>Population<\/jats:title><jats:p>Singleton, cephalic births at between 39<jats:sup>+0<\/jats:sup> and 42<jats:sup>+2<\/jats:sup>\u2009weeks of gestation, 2005\u20132016 (<jats:italic>n<\/jats:italic>\u2009=\u2009892\u2009339).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Relative risk ratios for mortality in relation to gestational duration were stratified by parity and BMI, and were adjusted for maternal age, smoking, country of birth and educational level.<\/jats:p><\/jats:sec><jats:sec><jats:title>Main outcome measures<\/jats:title><jats:p>Primary outcome: stillbirth or neonatal death before 45 post\u2010menstrual weeks. Secondary outcome: stillbirth.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Among children of primiparous women, children born at 41<jats:sup>+3<\/jats:sup>\u2009weeks of gestation, or later, were at increased risk of stillbirth or neonatal death before 45 post\u2010menstrual weeks compared with children born between 39<jats:sup>+0<\/jats:sup> and 40<jats:sup>+2<\/jats:sup>\u2009weeks of gestation (aRR 1.29, 95%\u2009CI 1.10\u20131.52). For primiparous women with BMIs of &lt;25, 25\u201329.9 and <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/bjo16964-math-0001.png\" xlink:title=\"urn:x-wiley:14700328:media:bjo16964:bjo16964-math-0001\"\/>30\u2009kg\/m<jats:sup>2<\/jats:sup>, the corresponding aRRs were: 1.04 (95%\u2009CI 0.81\u20131.34), 1.25 (95%\u2009CI 0.94\u20131.66) and 1.52 (95%\u2009CI 1.10\u20132.10), respectively. No significant increase in risk with gestational age was detected for multiparous women, regardless of BMI class. Among primipara, the risk of stillbirth increased with gestational duration in all BMI classes, with the highest risk increase for BMI\u2009\u2265\u200930\u2009kg\/m<jats:sup>2<\/jats:sup>, from 0.8\/1000 at 40<jats:sup>+3<\/jats:sup>\u201340<jats:sup>+6<\/jats:sup>\u2009weeks of gestation to 4.0\/1000 at 42<jats:sup>+0<\/jats:sup>\u201342<jats:sup>+2<\/jats:sup>\u2009weeks of gestation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>At 41<jats:sup>+3<\/jats:sup>\u201342<jats:sup>+2<\/jats:sup>\u2009weeks of gestation, pregnancy duration was associated with an increased risk for stillbirth or neonatal death before 45 post\u2010menstrual weeks among primiparous women, especially among women who were obese. For multiparous women, no significant association between gestational duration and mortality was found.<\/jats:p><\/jats:sec><jats:sec><jats:title>Tweetable abstract<\/jats:title><jats:p>In term pregnancies the risk for stillbirth and neonatal death is affected by gestational age, parity and BMI.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1471-0528.16964","type":"journal-article","created":{"date-parts":[[2021,10,13]],"date-time":"2021-10-13T01:51:17Z","timestamp":1634089877000},"page":"761-768","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Stillbirth or neonatal death before 45 post\u2010menstrual weeks in relation to gestational duration in pregnancies at 39\u2009weeks of gestation or beyond: the impact of parity and body mass index. A national cohort study"],"prefix":"10.1111","volume":"129","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5910-3907","authenticated-orcid":false,"given":"L","family":"Lindegren","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynaecology Institution of Clinical Sciences University of Lund Lund Sweden"},{"name":"Helsingborg Hospital Helsingborg Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Stuart","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Institution of Clinical Sciences University of Lund Lund Sweden"},{"name":"Helsingborg Hospital Helsingborg Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Herbst","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Institution of Clinical Sciences University of Lund Lund Sweden"},{"name":"Sk\u00e5ne University Hospital Lund Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K","family":"K\u00e4ll\u00e9n","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Institution of Clinical Sciences University of Lund Lund Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,11,8]]},"reference":[{"key":"e_1_2_5_2_1","first-page":"e98","article-title":"National, regional, and worldwide estimates of stillbirth rates in 2015 with trends from 2000: a systematic analysis","volume":"4","author":"Blencowe H","year":"2016","journal-title":"Lancet"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(14)61698-6"},{"volume-title":"Every Newborn: An Action Plan to End Preventable Deaths","year":"2014","author":"WHO\/UNICEF","key":"e_1_2_5_4_1"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(15)01020-X"},{"key":"e_1_2_5_6_1","unstructured":"The European Perinatal Health Report2015[https:\/\/www.europeristat.com\/images\/EPHR2015_web_hyperlinked_Euro\u2010Peristat.pdf]. 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