IRCT20230111057108N1 IRCT 2023-02-12 Shahre-kord University of Medical Sciences Evaluation of the effect of intrauterine injection of ciprofloxacin on chronic endometritis Evaluation of the effect of intrauterine injection of ciprofloxacin on chronic endometritis in patients recurrent implantation failure 2023-02-20 anticipated 30 Complete https://irct.ir/trial/68281 interventional Randomization: N/A, Blinding: Single blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment, Blinding description: The data before and after the intervention are unknown to the analyzer. 3 Endometritis - Recurrent implantation failure. Intervention group: The antibiotic regimen of drsoxycycline every 12 hours for 21 days and metronidazole 500 mg every 12 hours for 14 days will continue. In the next menstrual period, sampling will be done, in case of chronic endometritis, ciprofloxacin infusion solution with a concentration of 200 mg/100 ml in the form of 3 ml intrauterine infusion every 3 days using a 23 cm fetal replacement catheter. meter will be done. Therefore, the treatment cycle will be set for a period of one month including 10 infusions. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No decision has been made yet to share the data and documents of this research.