{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T18:28:47Z","timestamp":1790792927049,"version":"4.1.0"},"reference-count":29,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2014,5,19]],"date-time":"2014-05-19T00:00:00Z","timestamp":1400457600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Aust NZ J Obst Gynaeco"],"published-print":{"date-parts":[[2014,8]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>Births by elective caesarean section (<jats:styled-content style=\"fixed-case\">CS<\/jats:styled-content>) are rising, particularly before 39\u00a0weeks' gestation, which may be associated with unacceptably high risk of adverse neonatal outcomes. The optimal timing of these deliveries needs to be determined with recent recommendations to delay births by elective <jats:styled-content style=\"fixed-case\">CS<\/jats:styled-content> until 39\u00a0weeks.<\/jats:p><\/jats:sec><jats:sec><jats:title>Aims<\/jats:title><jats:p>To evaluate the association between gestational age (<jats:styled-content style=\"fixed-case\">GA<\/jats:styled-content>) at delivery and neonatal outcomes after elective <jats:styled-content style=\"fixed-case\">CS<\/jats:styled-content> between 37 and 41\u00a0weeks.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Retrospective cohort study of viable singleton neonates delivered by elective <jats:styled-content style=\"fixed-case\">CS<\/jats:styled-content> at Mater Mothers' Hospitals (1998\u20132009). Neonates were stratified into two <jats:styled-content style=\"fixed-case\">GA<\/jats:styled-content> groups with early term (<jats:styled-content style=\"fixed-case\">ET<\/jats:styled-content>, 37\u201338\u00a0weeks) compared with the reference group of full and late term (<jats:styled-content style=\"fixed-case\">FLT<\/jats:styled-content>, 39\u201341\u00a0weeks). The primary outcome examined was serious respiratory morbidity; secondary outcomes included depression at birth, nursery admission and assisted ventilation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Fourteen thousand and four hundred and forty\u2010seven mother\u2013baby pairs were included (59.9% delivered before 39\u00a0weeks). There was a significantly decreasing risk of adverse neonatal outcomes with increasing <jats:styled-content style=\"fixed-case\">GA<\/jats:styled-content>. Compared to <jats:styled-content style=\"fixed-case\">FLT<\/jats:styled-content>, delivery at <jats:styled-content style=\"fixed-case\">ET<\/jats:styled-content> almost tripled the risk of the primary outcome (<jats:styled-content style=\"fixed-case\">AOR<\/jats:styled-content> 2.74; 95% <jats:styled-content style=\"fixed-case\">CI<\/jats:styled-content> 1.79\u20134.21). Rates of most secondary outcomes were at least doubled.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Elective <jats:styled-content style=\"fixed-case\">CS<\/jats:styled-content> performed at 37\u201338\u00a0weeks is associated with poorer neonatal outcomes compared to those delivered at 39\u201341\u00a0weeks. This study supports recent recommendations to delay delivery by elective <jats:styled-content style=\"fixed-case\">CS<\/jats:styled-content> until week 39 if possible.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ajo.12220","type":"journal-article","created":{"date-parts":[[2014,5,19]],"date-time":"2014-05-19T05:53:06Z","timestamp":1400478786000},"page":"340-347","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":38,"title":["The timing of elective caesarean deliveries and early neonatal outcomes in singleton infants born 37\u201341\u00a0weeks' gestation"],"prefix":"10.1111","volume":"54","author":[{"given":"Emily","family":"Doan","sequence":"first","affiliation":[{"name":"School of Medicine The University of Queensland Brisbane Qld Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristen","family":"Gibbons","sequence":"additional","affiliation":[{"name":"Mater Research Office Mater Research South Brisbane Qld Australia"},{"name":"Mothers and Babies Research Mater Research South Brisbane Qld Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Tudehope","sequence":"additional","affiliation":[{"name":"School of Medicine The University of Queensland Brisbane Qld Australia"},{"name":"Mothers and Babies Research Mater Research South Brisbane Qld Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,5,19]]},"reference":[{"key":"e_1_2_6_2_1","unstructured":"LiZ ZekiR HilderLet\u00a0al.Australia's Mothers and Babies 2010. Perinatal statistics series no. 27. Cat. no. PER 57.Canberra:AIHW National Perinatal Epidemiology and Statistics Unit 2012."},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clp.2008.03.006"},{"key":"e_1_2_6_4_1","first-page":"1","article-title":"Births: final data for 2009","volume":"60","author":"Martin JA","year":"2011","journal-title":"Natl Vital Stat Rep"},{"key":"e_1_2_6_5_1","unstructured":"HumphreyM.Maternal and Perinatal Mortality and Morbidity in Queensland.Queensland Maternal and Perinatal Quality Council Report2011."},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2393-11-8"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1995.tb09060.x"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.39405.539282.BE"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2008-2407"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1523-536X.2007.00188.x"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1136\/adc.2006.112565"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.39363.706956.55"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1111\/ajo.12070"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2012.06.082"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2010.01.052"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa0803267"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e31816736e7"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e3182822193"},{"key":"e_1_2_6_19_1","unstructured":"Royal Australian and New Zealand College of Obstetricians and Gynaecologists.College statement: Caesarean delivery on maternal request 2010."},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000428647.67925.d3"},{"key":"e_1_2_6_21_1","unstructured":"National Institute of Health and Clinical Excellence.Clinical Guideline 132: Caesarean section 2011."},{"key":"e_1_2_6_22_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.2013.6235"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.5694\/j.1326-5377.1999.tb127678.x"},{"key":"e_1_2_6_24_1","doi-asserted-by":"publisher","DOI":"10.1186\/1477-7827-8-68"},{"key":"e_1_2_6_25_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e3182255999"},{"key":"e_1_2_6_26_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0056238"},{"key":"e_1_2_6_27_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e31819b5c8c"},{"key":"e_1_2_6_28_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2010.05.036"},{"key":"e_1_2_6_29_1","doi-asserted-by":"publisher","DOI":"10.1136\/adc.2009.168112"},{"key":"e_1_2_6_30_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.12278"}],"container-title":["Australian and New Zealand Journal of Obstetrics and Gynaecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fajo.12220","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/ajo.12220","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,2,3]],"date-time":"2025-02-03T04:36:36Z","timestamp":1738557396000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/ajo.12220"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,5,19]]},"references-count":29,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2014,8]]}},"alternative-id":["10.1111\/ajo.12220"],"URL":"https:\/\/doi.org\/10.1111\/ajo.12220","archive":["Portico"],"relation":{},"ISSN":["0004-8666","1479-828X"],"issn-type":[{"value":"0004-8666","type":"print"},{"value":"1479-828X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,5,19]]},"assertion":[{"value":"2013-11-07","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2014-04-18","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2014-05-19","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}