Hebeihsa 2018.

Methods	RCT
Participants	Women undergoing ICSI
Interventions	Study group: endometrial injury in the mid‐luteal phase of the previous cycle using pipelle and hysteroscopy plus injury performed by hysteroscopy grasper Control group: no intervention
Outcomes	Clinical pregnancy
Notes	Trial does not appear to be registered Inconsistencies within the paper including the methods stating that 80 women were recruited to each arm and that there were no cycle cancellations or drop‐outs, however the pregnancy outcomes are reported in 60 women in each arm. Additionally, exclusions may have occurred in the hysteroscopy group as the paper states quote: "any abnormality was recorded to exclude the case" ‐ it is not clear how many women were therefore excluded. An email was sent to the corresponding author with no reply.