Singh 2015.

Methods	RCT
Participants	Women with >1 previous failed IVF attempts
Interventions	Study group: endometrial scratching will be done once from days 14‐18 of menstrual cycle within the same IVF cycle. Anterior and posterior walls of endometrium will be scratched gently by a 4‐mm disposable Karman’s cannula inserted through the cervical os, and endometrial tissue will be sent for genetic analysis. Oral antibiotic ciprofloxacin 500 mg will be given for 5 days after the procedure Control group: no intervention. To avoid the possible confounding effect of antibiotic on IVF success, the control group will be administered the same antibiotic
Outcomes	Live birth, miscarriage However, the data appear to be inconsistent as there is a much higher implantation rate in the intervention arm yet a lower live birth rate. It appears the ongoing pregnancies may refer to pregnancies which were ongoing at the end of the trial (i.e. could be counted as a live birth); however this could not be confirmed with the authors.
Notes	Trial registration: CTRI/2014/01/004307 and CTRI/2013/12/004206 (registered Jan 2014 and Dec 2013, registered retrospectively) Limited correspondence undertaken with Neeta Singh (drneetasingh@yahoo.com)