As regard symptomatology in endometriotic patients, infertile patients had significantly higher levels of serum MIF compared to fertile endometriotic patients (1.87 ± 1.54 pg/ml vs 1.05 ± 0.74 pg/ml respectively, p <  0.001), with significantly higher levels in those with primary infertility compared to those with secondary infertility (2.3 ± 1.72 pg/ml vs 1.32 ± 1.07 pg/ml respectively, p < 0.001). The gene discussed is MIF; the disease is Infertility.