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We performed a case control study comparing pregnant women with severe coronavirus disease 19 (cases) to pregnant women with a milder form (controls) enrolled in the COVI-Preg international registry cohort between March 24 and July 26, 2020. Risk factors for severity, obstetrical and immediate neonatal outcomes were assessed. A total of 926 pregnant women with a positive test for SARS-CoV-2 were included, among which 92 (9.9%) presented with severe COVID-19 disease. Risk factors for severe maternal outcomes were pulmonary comorbidities [aOR 4.3, 95% CI 1.9\u20139.5], hypertensive disorders [aOR 2.7, 95% CI 1.0\u20137.0] and diabetes [aOR2.2, 95% CI 1.1\u20134.5]. Pregnant women with severe maternal outcomes were at higher risk of caesarean section [70.7% (n\u2009=\u200953\/75)], preterm delivery [62.7% (n\u2009=\u200932\/51)] and newborns requiring admission to the neonatal intensive care unit [41.3% (n\u2009=\u200931\/75)]. In this study, several risk factors for developing severe complications of SARS-CoV-2 infection among pregnant women were identified including pulmonary comorbidities, hypertensive disorders and diabetes. Obstetrical and neonatal outcomes appear to be influenced by the severity of maternal disease.<\/jats:p>","DOI":"10.1038\/s41598-021-92357-y","type":"journal-article","created":{"date-parts":[[2021,7,6]],"date-time":"2021-07-06T10:04:11Z","timestamp":1625565851000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":100,"title":["Maternal outcomes and risk factors for COVID-19 severity among pregnant women"],"prefix":"10.1038","volume":"11","author":[{"given":"Manon","family":"Vouga","sequence":"first","affiliation":[]},{"given":"Guillaume","family":"Favre","sequence":"additional","affiliation":[]},{"given":"Oscar","family":"Martinez-Perez","sequence":"additional","affiliation":[]},{"given":"Leo","family":"Pomar","sequence":"additional","affiliation":[]},{"given":"Laura 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