Introduction: Teratoma is the name given to the most common germinative cells tumor. It is originated from primitive germinative cells that migrates to the ovarium in the beginning of embrionary life. It can be differentiated in more specialized tissues, in other words, the mature teratoma, or remain more indifferentiated to consitute the immature tumor. Objective: This retrospective study analyses the clinic aspects and surgery techniques used to its treatment, besides the habits and risk factors of its occurrence. Method: The 81 cases included were operated in public services from ABC region. Results: The average age was 29,07 years old. The white race was the most affected one. The main complaint was pain. The twisted crots was the most common complication with 10,9% of the cases, 31 patients had menarche under 14 years old, 25, 92% of these were eumenorrheics. Most of the women were nulliparas and 19,75%, made hormonal contraception. Image exam was the main mean of diagnosis exam and the prevalent treatment was the non-conservative surgery. Conclusion: The fact that a great number of tumors was diagnosticated at intraoperative, specially because of a list of acute abdomen by the twist undertook crost, the most common complication. These facts, added to the large tumor size of the most tumor ocasioned the oopherectomy to the detriment of conservative surgery, probably by the reason of the surgeon’s inexperience envolved, being necessary a better training of them.