IRCT2013012512262N1 IRCT 2013-04-05 Tehran University of Medical Science, The effect of Vasopressin on decreasing time of surgery Assessment of the effect of Vasopressin injection on decreasing time of surgery and need to electrooagulation for hemostasis during laparascopic cystectomy of patients refered to Zanan Hospital because of endometriomas 2012-05-03 anticipated 14 Complete https://irct.ir/trial/12361 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. N/A Ovarian Endometrioma. Intervention 1: In case group,before the dissection of cyst wall ,3 mililiters containing 0.3 units diluted vasopressin of an ampule of vasopressin named (Hypress) which contains 20 units of vasopressin and diluted 200 times by adding 200 mililiters normal salin will be injected in the space between cyst wall and ovary by the specific needle,the injection will be in one place near the grater vessels. Then, 50-70 mililiters normal saline will be injected in multiple points . The cyst wall will be sent for pathological evaluation after stripping.Then the cyst`s bed would be assessed for bleeding and if needed electrocoagulation would be used for hemostasis. Intervention 2: In control group,before the dissection of cyst wall , 50-70 mililiters of normal saline will be injected in multiple points in the space between cyst wall and ovary by the specific needle,the. Then, The cyst wall will be sent for pathological evaluation after stripping.Then the cyst`s bed would be assessed for bleeding and if needed electrocoagulation would be used for hemostasis.