ChiCTR1800015943.

Study name	Effect of endometrial scratching on IVF/ICSI‐ET outcomes of women with repeated implantation failure: a randomized controlled trial
Methods	RCT
Participants	Women with implantation failure
Interventions	Intervention: endometrial scratching Control: No procedure
Outcomes	Clinical pregnancy rate; early abortion rate; live birth rate;
Starting date	May 2018
Contact information	Yang Xiaokui: +86 13810017724, xiaokuiyang2012@163.com
Notes	Trial registration status on 1 July 2020: recruiting Author correspondence: attempted, however no response was received