Background: -Menstruation is the cyclical shedding of the inner lining of the uterus, thernendometrium, under the control of hormones of the hypothalamo-pituitary axis.rnIn adolescents who experienced menstruation for the first time, menstrual hygienernmanagement is constrained by practical, social, economic and cultural factors such as thernexpense of commercial sanitary pads, lack of water and latrine facilities, lack of private roomsrnfor changing sanitary pads, and limited education about the facts of menstrual hygiene.rnHowever, menstrual hygiene management is an under researched issue in East Africa includingrnEthiopia.rnObjective: -The aim of the study was to assess menstrual hygiene management and associatedrnfactors among secondary and preparatory school girls in Bahir Dar city administration,rnNorthwest Ethiopia, 2016.rnMethods: - A cross-sectional quantitative study was conducted from March 1st- 31th, 2016rnto assess the menstrual hygiene management and associated factors among high school girlsrnin Bahir Dar city administration Northwest, Ethiopia on a minimum sample of 685 .rnData was collected by self-administered structured questionnaire. After checking forrncompleteness, data was coded and entered to SPSS version 20 for analysis.rnDescriptive and analytical statistics were employed. Bivariate analyses were used to examinernassociation between dependent and independent variables. All variables with p