HAMP and endometriosis: While hepcidin levels initially did not differ between our cohorts, a subsequent analysis of our groups’ percentile rankings (Q25, Q25-50, Q75) indicates differences in relative positions within the respective data sets collected [Q75 ranks: median (Range) (pg/ml): 26031 (17947–34973) in the endometriosis group (n = 15) vs. 14869 (12914–22755) in the control group (n = 7; Mann–Whitney test, p = 0.002)].