Figure 2
From: The impact of COVID-19 on pregnancy outcomes in a diverse cohort in England

Changes in modelled cumulative COVID-19 exposure during pregnancy. A graph illustrating the average modelled risk of COVID-19 (expressed as attack rate, or the % of population contracting COVID-19 during a specified time interval, calculated from modelled transmission data20) in each trimester of pregnancy, plotted against date of delivery between 17 February 2020 and 31 January 2021. The first trimester was defined as 0 to 12 + 6 weeks gestation, the second as 13 + 0 to 27 + 6 weeks, and the third as 28 + 0 weeks to delivery. Women exposed to COVID-19 in early pregnancy only delivered in the latter part of the study period.