Fig. 1

Scatter plot of prepill 1 and prepill 2 cortisol concentrations: a - absolute values for all cortisol pairs (n = 47); b - course of the two prepill cortisol concentrations in pairs in which both values were allocated to the same group according to the target range (1.5–5 μg/dl; n = 33); c - course of the two prepill cortisol concentrations in pairs in which the two cortisol values were not allocated to the same group (n = 14). The grey area represents the defined cortisol target range