Background: Abnormal uterine bleeding (AUB) is one of the most common problem for the patients and the gynecologists. Histological characteristics of endometrial biopsy material as assessed by light microscopy remains the diagnostic standard for the diagnosis of endometrial pathology. Material and Methods: In our prospective study of 100 patients of the age between 24-75 years, clinical characteristics and the pattern of endometrial histopathology and their association with hormone therapy administration were studied. Results: Total of 100 patients were divided into two subgroups one that received hormone therapy prior to endometrial biopsy and Group II in which hormone therapy was not administered prior to the said procedure. In both groups proliferative phase was the commonest followed by secretory endometrium in both groups. Pill change, Arias Stella reaction, tubercular endometritis, endometrial carcinoma was exclusively noted in the group in hormone therapy was administered prior to endometrial biopsy. Pill change endometrium was only significantly correlated with Group I (p=0.05). Simple hyperplasia, endometrial polyp, chronic endometritis, endocervical polyp, atrophic endometrium was noted in Group II of which simple hyperplasia (p=0.10) was not found to be clinically significant. Conclusions: The study of the endometrium in AUB revealed many structural and non-structural causes manifest in the form of different endometrial histopathological patterns in two groups with or without hormone therapy. Endometrial study gives significant etiological information in AUB when interpreted with relevance to age and other clinical data, thus guiding the appropriate management.