Control group (CC/hMG) will receive the 100 mg CC on days 3 to 7 of that cycle but will receive 150 mg human menopausal gonadotropin (HMG) during days of 7, 8, and 9. One of experimental Group (group B) will receive a 100 mg dose of CC but will receive a 200 IU Human chorionic gonadotropin (hCG; Choriomon; IBSA, Switzerland) intramuscular injection daily when the largest follicle is 12 mm or larger mean diameter. Other experimental group (Group C) will receive a 100 mg dose of CC but will receive a 200 IU Human chorionic gonadotropin (hCG; Choriomon; IBSA, Switzerland) intramuscular injection daily From day 9(without attention to follicle size). In both experimental groups HCG administration will be continued until the largest follicle is 18-20 mm.