IRCT20160224026750N2.

Study name	The effect of endometrial biopsy in increasing pregnancy rates in infertile women under intrauterine insemination treatment
Methods	Randomised controlled trial
Participants	Inclusion criteria: Younger than 40 years of age Irregular menstruation Body mass index < 30 Normal hysterosalpingography Normal Pap smear Normal uterine cavity Normal FSH, normal LH, normal oestradiol and TSH, normal prolactin, AMH > 1 Normal sperm analysis Exclusion criteria: Infertility with male factor Tubal factor infertility Ovarian cysts
Interventions	Intervention group: endometrial scratching on Cycle day 9 of the intrauterine insemination (IUI) cycle Control group: IUI without endometrial scratching
Outcomes	Clinical pregnancy, abortion
Starting date	December 2018 (confirmed by author correspondence)
Contact information	Somayeh Moradpanah; zmoradpanah@gmail.com
Notes	IRCT20160224026750N2 Trial completed in January 2019; publication of manuscript expected soon (confirmed by author correspondence in July 2020)