There was no significant difference between the HSCORE of NRP-1 of eutopic endometrial glandular epithelial cells from patients with endometriosis and that from patients without endometriosis (p = 0.120), but the HSCORE of NRP-1 of stromal cells from patients with endometriosis was obviously higher than that from patients without endometriosis (p = 0.002). The gene discussed is NRP1; the disease is endometriosis.