After a freeze all cycle, participants were divided in two groups: an intervention group (n=30), who underwent endometrial injury before the transfer, and a control group (n=30), who underwent no other intervention. The primary outcome was clinical pregnancy rate, while secondary clinical and laboratory parameters. Baseline and cycle characteristics were also compared between groups.
The investigators checked the hypothesis whether endometrial injury performed during the cycle before a frozen embryo transfer in women with RIF can improve pregnancy rates