IRCT2015100424335N1 IRCT 2016-01-18 Vice Chancellor for research of Shahid Sadoughi University of Medical Sciences Effect of delayed start protocol in outcome of ART cycle in poor ovarian responders Comparison of the effect of delayed start GnRH antagonist protocol and usual antagonist protocol on oocyte count and pregnancy rate in ART cycle in poor ovarian responders 2015-03-01 anticipated 72 Complete https://irct.ir/trial/20563 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomized with enveloped pocket method, Randomization description: In this trial,72 infertile women with poor ovarian response were informed about the research design and signed a written consent form. All women were randomly divided into two groups. Randomization was simple, individual, not blinded, using a random number table. 2 Infertility. Intervention 1: In intervention group 0/25 mg/vial cetrorelix( GNRH antagonist), one vial daily, subcutaneous, for 7 days, before starting COH. Then start ovarian stimulation with 375 units of gonadotropin. Intervention 2: in control group patients treated with antagonist protocol with 375 units of gonadotropin, without GNRH antagonist pretreatment. No - There is not a plan to make this available Justification or reason for not sharing IPD is The final result of the study will be published and there is no need to share individual participants' data