FN1 and infertility disorder: The relative amounts of the FN-fibrin complex III and IV (1300 and 1600 kDa) were 6.91 ± 6.86% and 2.94 ± 4.09%, respectively, in the endometriosis group, and 7.66 ± 7.02% and 3.38 ± 4.94%, respectively, in the fertility disorders group (Table 2).