Background: To study and analyze the structural and functional component of PALM COEIN of AUB in Perimenopausal women and its correlation with the Histopathology where ever applicable especially PALM component. Materials and Methods: This is a prospective observational study carried out on 100 non gravid women of perimenopausal and postmenopausal age groups who came to Gynaecology OPD with complaints of AUB. The data was analysed considering the inclusion and exclusion criteria. The PALM- COEIN classification was used to classify causes of AUB.