Fig. 1

Overview of the sample collection per analysis cohort. A stacked bar chart showing the number of samples collected at given time points during pregnancy. Each bar represents a group of samples collected during the specified week of gestation. Colors show the sample type, controls in green, and preeclampsia (PE) cases in orange. Separate charts show the numbers of samples used in the different analyses, presymptomatic (A), symptomatic (B) and longitudinal (C) study