 Histological and immunohistochemical assessment Histology classification will be carried out by two pathologists. Both pathologists will do a blind reading of different tissue sections of the same block-sample. After staining with hematoxylineosin and Schiff Periodic Acid PAS, each specimen was classified into one of the following categories: tissue insufficient for diagnosis, atrophic andor inactive endometrium, proliferative or weakly proliferative endometrium, and progestogenic . 