It was reported that the expression of TLR4 in the ectopic endometrium of endometriosis was higher than that in the normal endometrium, and the levels of TLR2 and TLR9 mRNAs were higher in the peritoneal effusions of endometriosis than in the non-endometriosis group12, 13. This evidence concerns the gene TLR2 and endometriosis.