Impact of COVID-19 in pregnancy on maternal and perinatal outcomes during the Delta variant period: a comparison of the Delta and pre-delta time periods, 2020-2021.

Background: To describe the impact on maternal and perinatal outcomes of the Delta variant of COVID-19 compared to the pre-Delta period in pregnant women with COVID-19 infections in one large public, non-profit hospital system.

Methods: We conducted a retrospective chart review of identified COVID-19 diagnosed pregnant women with the outcome of pregnancy (livebirth or stillbirths). We assessed maternal and perinatal outcomes between the pre-delta and Delta variant time periods.