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Knowledge of outcomes has been limited by small sample sizes and a focus on maternal rather than neonatal outcomes. This study uses population\u2010level data collected over 10\u00a0years to investigate maternal and neonatal outcomes and trends in incidence of abnormally invasive placenta (also known as placenta accreta, increta and percreta).<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and methods<\/jats:title><jats:p>A population\u2010based record linkage study was performed, including all women who gave birth in New South Wales, Australia, between 2003 and 2012. Data were obtained from birth records, hospital admissions and deaths registrations. Modified Poisson regression models, adjusted for confounding factors, were used to quantify the effect of abnormally invasive placenta on adverse maternal and neonatal outcomes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Abnormally invasive placenta was significantly associated with morbidity for mothers (adjusted relative risk 17.6, 99% confidence interval 14.5\u201321.2) and infants (adjusted relative risk 3.1, 99% confidence interval 2.7\u20133.5). Abnormally invasive placenta increased risk of stillbirth (relative risk 5.4, 99% confidence interval 4.0\u20137.3) and neonatal death (relative risk 8.0, 99% confidence interval 1.5\u201341.6). The overall rate of abnormally invasive placenta was 24.8 per 10\u00a0000 deliveries, and 22.7 per 10\u00a0000 among primiparae. Incidence increased by 30%, from 20.6 to 26.9 per 10\u00a0000, over the 10\u2010year study period.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Abnormally invasive placenta substantially increases the risk of severe adverse outcomes for mothers and babies, and the incidence is increasing. Delivery should occur in tertiary hospitals equipped with neonatal intensive care units. Clinicians should be cognizant of the risks, particularly to infants, and maintain a high index of suspicion of abnormally invasive placenta, including in primiparae.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aogs.13201","type":"journal-article","created":{"date-parts":[[2017,8,14]],"date-time":"2017-08-14T15:06:38Z","timestamp":1502723198000},"page":"1373-1381","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":73,"title":["Maternal and neonatal outcomes following abnormally invasive placenta: a population\u2010based record linkage study"],"prefix":"10.1111","volume":"96","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9991-5419","authenticated-orcid":false,"given":"Heather J.","family":"Baldwin","sequence":"first","affiliation":[{"name":"Clinical and Population Perinatal Health Research Kolling Institute Northern Sydney Local Health District St Leonards New South Wales Australia"},{"name":"Biostatistics Training Program New South Wales Ministry of Health North Sydney New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9888-9818","authenticated-orcid":false,"given":"Jillian A.","family":"Patterson","sequence":"additional","affiliation":[{"name":"Clinical and Population Perinatal Health Research Kolling Institute Northern Sydney Local Health District St Leonards New South Wales Australia"},{"name":"Sydney Medical School Northern University of Sydney Sydney New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5988-1346","authenticated-orcid":false,"given":"Tanya A.","family":"Nippita","sequence":"additional","affiliation":[{"name":"Clinical and Population Perinatal Health Research Kolling Institute Northern Sydney Local Health District St Leonards New South Wales Australia"},{"name":"Sydney Medical School Northern University of Sydney Sydney New South Wales Australia"},{"name":"Department of Obstetrics and Gynecology Royal North Shore Hospital St Leonards New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0795-669X","authenticated-orcid":false,"given":"Siranda","family":"Torvaldsen","sequence":"additional","affiliation":[{"name":"Clinical and Population Perinatal Health Research Kolling Institute Northern Sydney Local Health District St Leonards New South Wales Australia"},{"name":"Sydney Medical School Northern University of Sydney Sydney New South Wales Australia"},{"name":"School of Public Health and Community Medicine University of New South Wales Kensington New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6024-2958","authenticated-orcid":false,"given":"Ibinabo","family":"Ibiebele","sequence":"additional","affiliation":[{"name":"Clinical and Population Perinatal Health Research Kolling Institute Northern Sydney Local Health District St Leonards New South Wales Australia"},{"name":"Sydney Medical School Northern University of Sydney Sydney New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5172-3004","authenticated-orcid":false,"given":"Judy M.","family":"Simpson","sequence":"additional","affiliation":[{"name":"Sydney School of Public Health University of Sydney Sydney New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7272-7733","authenticated-orcid":false,"given":"Jane B.","family":"Ford","sequence":"additional","affiliation":[{"name":"Clinical and Population Perinatal Health Research Kolling Institute Northern Sydney Local Health District St Leonards New South Wales Australia"},{"name":"Sydney Medical School Northern University of Sydney Sydney New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,9,14]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0052893"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000136084.92846.95"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(97)70463-0"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.3109\/14767058.2013.799654"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2004.12.074"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1053\/plac.2001.0764"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.12405"},{"key":"e_1_2_9_9_1","unstructured":"Centre for Health Record Linkage.CHeReL \u2013 quality assurance.2017. 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