For the analysis of the relative reactivities with the panel of lectins used, MPL, VVL, Jacalin and PHA-L meet the following criteria: they differentiate advanced endometriosis and non-endometriosis patients from the control group of healthy women as well as having high clinical value according to the results of ROC curve analysis (AUC = 1). The gene discussed is MPL; the disease is endometriosis.