{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T13:28:55Z","timestamp":1770902935783,"version":"3.50.1"},"reference-count":21,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2013,2,25]],"date-time":"2013-02-25T00:00:00Z","timestamp":1361750400000},"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":[[2013,4]]},"abstract":"Background<\/jats:title>The number of twins born in A<\/jats:styled-content>ustralia steadily increased from 2420 sets in 1983 to 4458 sets in 2010. At one stage, almost 25% of all twin deliveries in A<\/jats:styled-content>ustralia were a consequence of assisted reproductive technologies.<\/jats:p><\/jats:sec>Aims<\/jats:title>To determine the influence of a policy of single embryo transfer (SET) on the rate of multiple deliveries in A<\/jats:styled-content>ustralia.<\/jats:p><\/jats:sec>Methods<\/jats:title>We used population data to compare the prevalence of twin and higher order multiple births in women giving birth in A<\/jats:styled-content>ustralia before and after the implementation of the RTAC COP<\/jats:styled-content> 2001 and 2005 revisions for ART<\/jats:styled-content> units.<\/jats:p><\/jats:sec>Results<\/jats:title>There was a steady fall in the twin delivery rate for assisted reproductive technologies from 210.4 per 1000 deliveries in 2001 to 84.3 per 1000 deliveries in 2009. In 2009, assisted reproductive technologies accounted for approximately 16% of all twin births from 3% of all conceptions, substantially less than the 24.5% in 2002.<\/jats:p><\/jats:sec>Conclusions<\/jats:title>The decline in multiple births is multifactorial. However, the fall in the proportion of ART<\/jats:styled-content> multiple births has paralleled adoption of a voluntary policy of SET within a setting of largely public funding of ART<\/jats:styled-content>.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ajo.12048","type":"journal-article","created":{"date-parts":[[2013,2,25]],"date-time":"2013-02-25T11:06:53Z","timestamp":1361790413000},"page":"158-164","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Multiple deliveries: The reduced impact of in vitro<\/i> fertilisation in A<\/scp>ustralia"],"prefix":"10.1111","volume":"53","author":[{"given":"Mark P.","family":"Umstad","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynaecology University of Melbourne Multiple Pregnancy Clinic Royal Women's Hospital Melbourne Victoria Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lyndon","family":"Hale","sequence":"additional","affiliation":[{"name":"Melbourne IVF Gynaecologist Reproductive Services Royal Women's Hospital Melbourne Victoria Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yueping A.","family":"Wang","sequence":"additional","affiliation":[{"name":"Perinatal and Reproductive Epidemiology Research Unit The University of New South Wales Sydney NSW Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elizabeth A.","family":"Sullivan","sequence":"additional","affiliation":[{"name":"Perinatal and Reproductive Epidemiology Research Unit The University of New South Wales Sydney NSW Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,2,25]]},"reference":[{"key":"e_1_2_7_2_1","volume-title":"Australia's mothers and their babies 1991","author":"Lancaster P"},{"key":"e_1_2_7_3_1","volume-title":"Australia's mothers and babies 2009","author":"Li Z","year":"2011"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.5694\/j.1326-5377.2003.tb05384.x"},{"key":"e_1_2_7_5_1","volume-title":"Multiple Pregnancy \u2010 Epidemiology, Gestation & Perinatal Outcome","author":"Umstad MP","year":"2005"},{"key":"e_1_2_7_6_1","unstructured":"Human Fertility and Embryology Authority. 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