Fig. 1: Selection of vaccinated and unvaccinated pregnancy cohorts for miscarriage outcome analysis.

Flow diagram showing the selection of pregnancies for the analysis of the association between COVID-19 vaccination and risk of miscarriage. *For miscarriage analysis, vaccination needs to be given between 6 weeks preconception and up to the earliest of (1) end of pregnancy or (2) 19 weeks 6 days gestation.