{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T20:11:03Z","timestamp":1792008663993,"version":"4.4.0"},"reference-count":17,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2012,4,11]],"date-time":"2012-04-11T00:00:00Z","timestamp":1334102400000},"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":[[2012,8]]},"abstract":"Objective<\/jats:title>For more than three decades, women at imminent risk of preterm birth (PTB<\/jats:styled-content>) in W<\/jats:styled-content>estern A<\/jats:styled-content>ustralia have been transferred by small aircraft over long distances to the single tertiary level perinatal centre in P<\/jats:styled-content>erth, with no known case of birth during the flight. We aimed to review recent experience to understand how aircraft travel may delay PTB<\/jats:styled-content>.<\/jats:p><\/jats:sec>Design and setting<\/jats:title>Retrospective observational study of 500 consecutive R<\/jats:styled-content>oyal F<\/jats:styled-content>lying D<\/jats:styled-content>octor S<\/jats:styled-content>ervice (RFDS<\/jats:styled-content>) transfers of women at risk of preterm labour to the tertiary referral centre, from S<\/jats:styled-content>eptember 2007 to D<\/jats:styled-content>ecember 31, 2009.<\/jats:p><\/jats:sec>Main outcome measures<\/jats:title>In\u2010flight delivery, complications associated with transfer and factors associated with delay in preterm delivery.<\/jats:p><\/jats:sec>Results<\/jats:title>There were no in\u2010flight deliveries or serious complications associated with the aeromedical transfer of these patients. In a multivariable Cox proportional hazards regression analysis, clinical factors in the presentation that were associated with a shorter time from landing to subsequent delivery included cervical dilatation \u22654\u00a0cm, ruptured membranes, gestational age\u00a0>\u00a032\u00a0weeks and nulliparity. The aircraft reaching an ambient altitude\u00a0>\u00a014,000\u00a0feet, or cabin altitude above zero (sea level), was associated with a delay in time from landing to delivery for women who were not in spontaneous preterm labour.<\/jats:p><\/jats:sec>Conclusions<\/jats:title>Our findings add to a 30\u2010year experience that women at risk of preterm labour do not deliver during aeromedical transfer. Ambient and cabin altitude of the aircraft were associated with an extension in the time to delivery after arrival. The mechanisms underpinning this effect warrant further investigation.<\/jats:p><\/jats:sec>","DOI":"10.1111\/j.1479-828x.2012.01426.x","type":"journal-article","created":{"date-parts":[[2012,4,11]],"date-time":"2012-04-11T16:06:33Z","timestamp":1334160393000},"page":"327-333","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Aeromedical transfer of women at risk of preterm delivery in remote and rural W<\/scp>estern A<\/scp>ustralia: Why are there no births in flight?"],"prefix":"10.1111","volume":"52","author":[{"given":"Natalie","family":"AKL","sequence":"first","affiliation":[{"name":"School of Women's and Infants' Health King Edward Memorial Hospital University of Western Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edwina A.","family":"Coghlan","sequence":"additional","affiliation":[{"name":"School of Women's and Infants' Health King Edward Memorial Hospital University of Western 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