 - To translate these findings into the use of modulators of these inflammatory molecules to improve pregnancy rates in patients with predicted implantation defects. It is widely known that classic markers of endometrial receptivity such as those provided by an invasive endometrial biopsy with Hematoxilin-Eosin staining, or immuhistochemistry, or even with microarray technology are not reliable to establish clear-cut diagnosis due to cycle-to-cycle variations and overlap of results. 