Gynecologic and obstetric disorders presenting with abdominal pain are ectopic pregnancy, rupture of endometrial cysts, mature cystic teratoma and torsion of the adnexae. Hemorrhagic ovarian cysts, which included among the functional cysts, are often involved in acute abdomen leading to laparotomy intervention. As the practice of ovulation induction has increased, ovarian hyperstimulation syndrome (OHSS) has become a frequent, and potentially fatal, clinical problem. It is characterized by gross ovarian enlargement, ascites, pleural effusion, hemoconcentration and thromboembolic disorders, which are life-threatening conditions. Management of OHSS is based on these pathogenic changes. We experienced a large hemorrhagic ovarian cyst without hemoperitoneum in a patient with OHSS. To our knowledge, there are few reports1 of hemorrhagic ovarian cyst in patients with OHSS. Gynecologic and obstetric disorders presenting with abdominal pain are ectopic pregnancy, rupture of endometrial cysts, mature cystic teratoma and torsion of the adnexae. Hemorrhagic ovarian cysts, which included among the functional cysts, are often involved in acute abdomen leading to laparotomy intervention. Practice of ovulation induction has increased, ovarian hyperstimulation syndrome (OHSS) has become a frequent, and potentially fatal, clinical problem. It is characterized by gross ovarian enlargement, ascites, pleural effusion, hemoconcentration and thromboembolic disorders, which are life-threatening conditions. Management of OHSS is based on these pathogenic changes. We experienced a large hemorrhagic ovarian cyst without hemoperitoneum in a patient with OHSS. To our knowledge, there are few reports  1 of hemorrhagic ovarian cyst in patients with OHSS.