JAMA : the journal of the American Medical Association
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Observational Study
Association of SARS-CoV-2 Infection During Pregnancy With Maternal and Perinatal Outcomes.
There are limited high-quality, population-level data about the effect of SARS-CoV-2 infection on pregnancy using contemporaneous comparator cohorts. ⋯ In this exploratory surveillance study conducted in Canada from March 2020 to October 2021, SARS-CoV-2 infection during pregnancy was significantly associated with increased risk of adverse maternal outcomes and preterm birth.