LGALS1 and Infertility: Moreover, gal-1 increased expression in eutopic endometrium of endometriotic women compared to healthy ones, could possibly indicate its implication in endometriotic women’s infertility profile, as gal-1 is a crucial immune factor involved in implantation and decidualization which expression is altered in a pathological condition such as endometriosis characterised by altered endometrium.