Figure 2
From: Natural menstrual rhythm and oral contraception diversely affect exhaled breath compositions
Comparisons of four endogenous VOCs from all women, control- and contraception cohort. Y-axes represent median signal intensities of exhaled endogenous VOCs. X-axes represent the six different measurement points (i.e. different menstrual cycle phases from first menstrual bleeding to 2nd menstrual bleeding) corresponding to the time course of the study. VOC data of all phases were compared to the corresponding median values in the initial ‘menstrual bleeding (MB)’ phase. The ‘*’ symbols (red and green colored) represent the statistically significant (i.e. P-value ≤ 0.005) differences in relation to the initial MB phase. A green ‘*’ is used to assign significant changes at the ovulation phase.
