Abstract: Objective：To compare the effectiveness，side effects and clinical outcomes of the levonorgestrel-releasing intrauterine system and the transcervical resection of endometrium in treating menorrhagia without organic uterine disease. Methods：In this prospective study，96 patients with menorrhagia were divided into two groups after the informed consent，LNG-IUS group with 46 cases and TCRE group with 50 cases. The bleeding volume，hemoglobin and side-effects of two groups were compared. Results：The bleeding amounts of both groups were reduced effectively after treatment，while the effect of TCRE was better than that of LNG-IUS （P＜0.05）. There was not significant difference between two groups in hemoglobin（P＜0.05），and there were not severe complications in two groups. The rat of side effects in the LNG-IUS group （69.6%） was more than that in the TCRE group （14%）. Conclusions：Both LNG-IUS and TCRE can reverse the menorrhagia without organic uterine disease. LNG-IUS is suitable for the young patients who require the reserving of eugenesis and TCRE for the patients who do not want prengancy any more.

Key words: Delayed-action preparations, Intrauterine devices, medicated, Levonorgestrel, Electrosurgery, Hysteroscopy, Endometrium, Menorrhagia