NCT03470298.

Study name	Retrieval versus mid‐luteal endometrial scratching (ES) for intracytoplasmic sperm injection (ICSI)
Methods	RCT
Participants	Women having ICSI
Interventions	Intervention1: endometrial scratching just after finishing oocyte pick up Intervention2: endometrial scratching one week before starting controlled ovarian hyperstimulation. Endometrial scratching performed by Manual Vacuum Aspiration (MVA) size 5 moved from below upwards with suction, scratching anterior uterine wall then posterior then left lateral uterine wall then right lateral uterine wall and lastly funds.
Outcomes	Live birth, clinical pregnancy
Starting date	1 January 2017
Contact information	None provided
Notes	Trial registration status on 03 July 2020: unknown No contact information provided, unable to contact research team

ART: assisted reproductive technology; FET: frozen embryo transfer;ICSI: intracytoplasmic sperm injection; ; IVF: in vitro fertilisation; RCT: randomised controlled trial; RIF: recurrent implantation failure.