Objective To investigate the Expression of interleukin-18(IL-18)and cyclooxygenase2(COX-2)in endometriosis.Methods Enzyme linked immunosorbent assay and innunohistochemistry were used to detrermine the levels of interleukin-18 in peritoneal fluid and serum,the expression difference of cyclooxygenase2 in ectopic endometrium with endometriosis and the normal control.Results The levels of interleukin-18 in peritoneal fluid and serum were higher than that of normal control,the expression of cyclooxygenase2 in e...