Our study is a case-control study that will be made in woman health hospital and medical biochemistry department -assiut university. We will estimate the tissue level of galectin-3 in endometrium of both healthy and endometriosis women and detect wether galectin-3 leads to or protect against endometriosis. Also, we will measure the level of oxidative stress markers in endometrium of both healthy and endometriosis women and investigate the correlaton between them and galectin-in endometriosis women.