In the presented study, tested FN molecular forms, namely: The FN dimer (500 kDa) and the FN-fibrin complex 750 kDa reached moderate and high clinical values of AUC, 0.868 and 0.805, respectively, for women with endometriosis, and 0.904 and 0.0809, respectively, for women with fertility disorders (Table 3). This evidence concerns the gene FN1 and infertility disorder.