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Birth prevalence was calculated and data analysed using descriptive statistics and logistic regression. It was adjusted for confounding variables and stratified by plurality and gestational age.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In total, 211 660 live births were included; prevalence of CP was increased in children born after ART (7.2\/1000 live births compared with naturally conceived births, 2.5\/1000). Odds of CP were doubled for singletons; when stratified by gestational age odds were only increased in the under 32\u2010week group. Prevalence of CP was increased in ART (9.9\/1000 live births) and naturally conceived twins (8.4\/1000 live births). Clinical outcomes were similar between ART and naturally conceived children.<\/jats:p><\/jats:sec><jats:sec><jats:title>Interpretation<\/jats:title><jats:p>The birth prevalence of CP is increased two\u2010fold after ART. After stratification for gestational age and plurality, residual risk remains in singletons born very preterm. Birth prevalence of CP will be tracked over time to identify any impact of changes to clinical practice.<\/jats:p><\/jats:sec><jats:sec><jats:title>What this paper adds<\/jats:title><jats:p>\n<jats:list list-type=\"bullet\">\n\n<jats:list-item><jats:p>In Western Australia, assisted reproductive technology (ART) increases birth prevalence of cerebral palsy (CP), mediated mostly by preterm and multiple births.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>Preterm birth alone does not account for the doubled odds of CP for ART singletons born very preterm.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>Clinical outcomes are similar between ART and naturally conceived children with CP.<\/jats:p><\/jats:list-item>\n<\/jats:list>\n<\/jats:p><\/jats:sec>","DOI":"10.1111\/dmcn.13577","type":"journal-article","created":{"date-parts":[[2017,10,5]],"date-time":"2017-10-05T04:56:36Z","timestamp":1507179396000},"page":"73-80","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":55,"title":["Cerebral palsy after assisted reproductive technology: a cohort study"],"prefix":"10.1111","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3903-6142","authenticated-orcid":false,"given":"Shona","family":"Goldsmith","sequence":"first","affiliation":[{"name":"Cerebral Palsy Alliance Research Institute Discipline of Child and Adolescent Health The University of Sydney Sydney Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah","family":"Mcintyre","sequence":"additional","affiliation":[{"name":"Cerebral Palsy Alliance Research Institute Discipline of Child and Adolescent Health The University of Sydney Sydney Australia"},{"name":"Telethon Kids Institute University of Western Australia Perth Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nadia","family":"Badawi","sequence":"additional","affiliation":[{"name":"Cerebral Palsy Alliance Research Institute Discipline of Child and Adolescent Health The University of Sydney Sydney Australia"},{"name":"Grace Centre for Newborn Care The Children's Hospital at Westmead Sydney Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michele","family":"Hansen","sequence":"additional","affiliation":[{"name":"Telethon Kids Institute University of Western Australia Perth Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,10,4]]},"reference":[{"key":"e_1_2_7_2_1","volume-title":"Report of the Australian Cerebral Palsy Register, Birth Years 1993\u20132009","author":"Australian Cerebral Palsy 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