{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T00:28:41Z","timestamp":1787099321301,"version":"build-2736575974"},"reference-count":49,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T00:00:00Z","timestamp":1776038400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T00:00:00Z","timestamp":1776038400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100017511","name":"Metro North Hospital and Health Service","doi-asserted-by":"publisher","award":["CRG\u2010413\u20102022"],"award-info":[{"award-number":["CRG\u2010413\u20102022"]}],"id":[{"id":"10.13039\/100017511","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000925","name":"National Health and Medical Research Council","doi-asserted-by":"publisher","award":["2001729"],"award-info":[{"award-number":["2001729"]}],"id":[{"id":"10.13039\/501100000925","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000925","name":"National Health and Medical Research Council","doi-asserted-by":"publisher","award":["2007001"],"award-info":[{"award-number":["2007001"]}],"id":[{"id":"10.13039\/501100000925","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["BJOG"],"published-print":{"date-parts":[[2026,9]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objective<\/jats:title>\n To explore the relationship between different definitions of objectively measured supine sleep position during late pregnancy and customised birthweight centile, as a marker of fetal wellbeing.<\/jats:p>\n <\/jats:sec>\n \n Design<\/jats:title>\n Prospective cohort study.<\/jats:p>\n <\/jats:sec>\n \n Setting<\/jats:title>\n Australian public hospital antenatal clinic.<\/jats:p>\n <\/jats:sec>\n \n Population<\/jats:title>\n Eighty\u2010four pregnant women from 32\u201336\u2009weeks of gestation.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Body position was measured in degrees of roll using a tri\u2010axial accelerometer worn around the abdomen for seven sequential nights. Supine was defined as \u2018broad supine\u2019 (0\u00b0\u2009=\u2009fully supine to 45\u00b0 left\/right tilt), and \u2018supine low\u2010tilt\u2019 (0\u00b0\u201315\u00b0). Two additional Risk Indices capturing risk proportional to duration spent in each degree of supine\u2010to\u2010lateral tilt were developed. Birthweights were converted into customised centiles using GROW software.<\/jats:p>\n <\/jats:sec>\n \n Main Outcome Measures<\/jats:title>\n The primary outcome was customised birthweight centile. Secondary outcomes included birthweight, gestational age at delivery, and fetal growth trajectory.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n Across 556 nights of data, the median nightly duration of broad supine positioning was 65.9 [25.0, 125.7] minutes compared to only 9.1 [0.7, 24.4] minutes of supine low\u2010tilt. There was no relationship between customised birthweight centile and time spent in broad supine (\n R<\/jats:italic>\n 2<\/jats:sup>\n \u2009=\u20090.0027,\n F<\/jats:italic>\n (1,82)\u2009=\u20090.22,\n p<\/jats:italic>\n \u2009=\u20090.64) or supine low\u2010tilt (\n R<\/jats:italic>\n 2<\/jats:sup>\n \u2009=\u20090.0029,\n F<\/jats:italic>\n (1,82)\u2009=\u20090.24,\n p<\/jats:italic>\n \u2009=\u20090.63); nor with any supine risk index and customised birthweight centile, birthweight, gestational age at delivery, or fetal growth trajectory.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n In this cohort, there was no evidence of an association between objectively measured supine sleep and customised birthweight centile. Yet to be identified mechanisms unrelated to fetal growth may be responsible for supine going\u2010to\u2010sleep position being a risk factor for late stillbirth. Further prospective investigation is needed to untangle cause and effect; however, given the low rate of stillbirth, such a study may not be feasible.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/1471-0528.70246","type":"journal-article","created":{"date-parts":[[2026,4,14]],"date-time":"2026-04-14T05:04:51Z","timestamp":1776143091000},"page":"1905-1915","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Objectively Measured Maternal Supine Sleep and Fetal Growth: A Prospective Cohort Study"],"prefix":"10.1111","volume":"133","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6754-7359","authenticated-orcid":false,"given":"Danielle L.","family":"Wilson","sequence":"first","affiliation":[{"name":"Sleep Disorders Centre The Prince Charles Hospital Brisbane Queensland Australia"},{"name":"School of Electrical Engineering and Computer Science The University of Queensland Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dwayne L.","family":"Mann","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering and Computer Science The University of Queensland Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Irene","family":"Szollosi","sequence":"additional","affiliation":[{"name":"Sleep Disorders Centre The Prince Charles Hospital Brisbane Queensland Australia"},{"name":"Faculty of Health, Medicine and Behavioural Sciences The University of Queensland Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonie","family":"Callaway","sequence":"additional","affiliation":[{"name":"Women's and Newborn Services Royal Brisbane and Women's Hospital Brisbane Queensland Australia"},{"name":"Faculty of Medicine The University of Queensland Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alka","family":"Kothari","sequence":"additional","affiliation":[{"name":"Faculty of Medicine The University of Queensland Brisbane Queensland Australia"},{"name":"Department of Obstetrics and Gynaecology Redcliffe Hospital Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philip I.","family":"Terrill","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering and Computer Science The University of Queensland Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,4,13]]},"reference":[{"key":"e_1_2_13_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.eclinm.2019.03.014"},{"key":"e_1_2_13_3_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamanetworkopen.2019.12614"},{"key":"e_1_2_13_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.17192"},{"key":"e_1_2_13_5_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884-020-03401-0"},{"key":"e_1_2_13_6_1","volume-title":"Sleep on Your Side: Sleeping on Your Side After 28\u2009Weeks Can Help Prevent Stillbirth","author":"Stillbirth Centre of Research Excellence"},{"key":"e_1_2_13_7_1","unstructured":"Tommy's Sleep on Aide: A Pregnancy Campaign 2017 https:\/\/www.tommys.org\/pregnancy\u2010information\/im\u2010pregnant\/sleep\u2010side\/sleep\u2010side\u2010pregnancy\u2010campaign."},{"key":"e_1_2_13_8_1","unstructured":"Cure Kids Sleep on Side When Baby's Inside From 28\u2009Weeks of Pregnancy 2018 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