Severe maternal morbidity and mortality during the COVID-19 pandemic: a cohort study in Rio de Janeiro.

Objectives: To identify factors associated with adverse maternal outcomes during the coronavirus disease 2019 (COVID-19) pandemic.

Methods: This was a single-centre prospective cohort study at a maternity department in a public general hospital in Rio de Janeiro. All pregnant women evaluated for emergency care, labour and delivery, respiratory symptoms, obstetric reasons or medical reasons between May 2020 and March 2022 at the study institution were invited to enrol in this study.