Perinatal outcomes after admission with COVID-19 in pregnancy: a UK national cohort study

NATURE COMMUNICATIONS(2024)

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Abstract
There are few population-based studies of sufficient size and follow-up duration to have reliably assessed perinatal outcomes for pregnant women hospitalised with SARS-CoV-2 infection. The United Kingdom Obstetric Surveillance System (UKOSS) covers all 194 consultant-led UK maternity units and included all pregnant women admitted to hospital with an ongoing SARS-CoV-2 infection. Here we show that in this large national cohort comprising two years' active surveillance over four SARS-CoV-2 variant periods and with near complete follow-up of pregnancy outcomes for 16,627 included women, severe perinatal outcomes were more common in women with moderate to severe COVID-19, during the delta dominant period and among unvaccinated women. We provide strong evidence to recommend continuous surveillance of pregnancy outcomes in future pandemics and to continue to recommend SARS-CoV-2 vaccination in pregnancy to protect both mothers and babies. The impacts of maternal SARS-CoV-2 infection on newborns are not well understood. Here, the authors perform a national cohort study using data on births in the UK from March 2020-March 2022 and find that moderate to severe maternal COVID-19 was associated with adverse perinatal outcomes.
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