Study	Reason for exclusion
Brown 2000	Not addressing the PICO research questions of the Cochrane Review. Parallel group randomised trial comparing the diagnostic accuracy, pain scores, and procedure length of outpatient hysteroscopy, hysterosalpingography (HSG), and saline infusion hystero sonography (SIS) for evaluation of the uterine cavity of infertile women.
El‐Khayat 2015	Not addressing the PICO research questions of the Cochrane Review. Parallel group randomised trial comparing office hysteroscopy with endometrial scratch versus office hysteroscopy on intrauterine insemination outcome. The aim of the trial was to evaluate the role of endometrial injury in the cycle preceding ovarian stimulation for intrauterine insemination (IUI) cycle on the clinical pregnancy rate.
Fatemi 2010	Not a randomised controlled trial; prevalence study
Hebeisha 2018	Randomised trial included women undergoing IVF, and investigated role of endometrial scratch before ICSI. The trial had three arms: first arm underwent endometrial scratch, second arm underwent hysteroscopy and endometrial scratch, and control arm underwent direct IVF. Investigators excluded women who were found to have intracavitary abnormalities during hysteroscopy (as communicated by authors). Since women who had normal ultrasound but intracavitary abnormalities were excluded from hysteroscopy, we excluded this trial, since current review focus was on effectiveness of screening hysteroscopy with or without treatment of intracavitary abnormalities.
Kamel 2015	Not a randomised controlled trial
Kasius 2013	Cost‐effectiveness analysis study
Shokeir 2016	RCT on the effectiveness of local endometrial injury To evaluate the efficacy of a hysteroscopic site‐specific local endometrial injury (LEI) in a group of women with unexplained infertility (UI), undergoing expectant management with no fertility treatment versus no intervention.
Siristatidis 2017	Non randomised trial
Wang 2011	Different population; women with endometritis
Zhang 2015	Diagnostic hysteroscopy was performed for both intervention and control group to rule out intracavitary pathologies. Those with intracavitary abnormalities on hysteroscopy were excluded.

RCT = randomised controlled trial