IRCT20140224016705N9 IRCT 2019-12-18 Shahid Beheshti University of Medical Sciences letrozole combined with gonadotropin in infertile patients with diminished ovarian reserve Ovarian response to letrozole combined with gonadotropin regimen in patient with diminished ovarian reserve candidate for IVF 2017-03-21 anticipated 72 Complete https://irct.ir/trial/32546 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment. 4 infertility. Intervention group: The patient were treated by letrozole at 7.5 mg/day (Saha pharmaceutical company) and Gonal-f at 225 mg/day (Merck pharmaceutical company), started on the 2nd-3rd day of menstrual period and continued for 5 days. Then, once the leading follicle had reached size of 16-18mm, Ovitrelle (injectable hCG) at 250mg (Merck pharmaceutical company) was administered for pateint. The patients were monitored by ultrasonography every 2 or 3 days.. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no further information