The good initial results and the request of conservative treatments by some women, desiring pregnancies, encouraged us to start this preliminary trial to evaluate the long-term efficacy and prognosis of hysteroscopic resection and coagulation of the base of endometrial polyps with focal atypia in a little sample of fertile women. Other studies suggest progestin treatment of well differentiated carcinoma in young women who desired to preserve their fertility. There is no evidence of a correlation between the tendency to develop endometrial polyps and the risk of endometrial carcinoma. The risk of malignant degeneration of endometrial polyps is not well known, but seems to range between 0.5% and 6%. On this background, we decided to study in the same population of fertile women and with a quasi-randomised design the possible additional effect of levonorgestrel-releasing intrauterine device (LNG-IUD).