IRCT201109136626N3 IRCT 2011-10-16 Tabriz University of Medical Sciences Comparsion of effects of Gonadotropin Releasing Hormon Agonists and Antagonists in ART cycles in infertile patients Comparsion of effects of Gonadotropin Releasing Hormon Agonists and Antagonists in ART cycles in patients 35 years and older 2011-09-11 anticipated 120 Complete https://irct.ir/trial/7066 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. N/A infertility. Intervention 1: Exogenic gonadotropin Gonal F 75unit IM daily and Monogon 150 unit IM daily both of them at 2th_3th of cycle if ovarians are inactive and endometial thickness is less than 4mm (in both groups). Intervention 2: Gonadotropin Releasing Hormon Agonist (superfact) 0.5 cc subcutaneus daily from 21th day of cycle until diameter of dominant follicle reachs to 18_19mm (in group one). Intervention 3: Gonadotropin Releasing Hormon Antagonist (cetrotide) 3.5mg subcutaneus single dose (in second group). Intervention 4: Human chorionic gonadothropin (hcg)(pregnil)1000 unit IM single dose ,when diameter of dominant follicle reachs 18_19mm.