 Statistical analysis Statistical analysis will be performed using the StatistiXL PackageTM Statistical Power for Microsoft Excel version 1.8, 2007. Differences in demographic parameters, immunohistochemical staining index of ER, PR and Bcl-2 protein expression numerical density, as well as baseline and treatment end-point endometrial thickness, will be analyzed by the paired Students t-test in the different groups. The relationships between ER, PR and Bcl-2 protein expression in stroma and glandular epithelium will be analyzed using Spearmans test. 