Taking into consideration that gal-1 has a vital role at inflammatory sites, in implantation and decidualization as well, combined with the fact that endometriosis is accompanied with inflammation and infertility, we thought that it would be interesting to investigate and compare gal-1 expression in eutopic endometrium of both healthy and disease women and to compare gal-1 expression levels in eutopic and ectopic endometrium of disease women trying to further clarify gal-1 role in endometriosis. The gene discussed is LGALS1; the disease is Infertility.