When compared to controls, increased CRP plasma levels were found in women with stage III-IV of endometriosis using either the classical CRP assay or the hsCRP assay during both the luteal phase (p = 0.0033 or p = 0.0005, respectively) and the follicular phase (p = 0.038 or p = 0.0025, respectively) but not during the menstrual phase (Table 2). This evidence concerns the gene CRP and endometriosis.