Background: Menstruation is a physiological event in the life of a woman, influenced by the endocrinal system. Several factors that affect physical, emotional and mental status of a woman can have an effect on menstruation. This study is aimed at measuring the prevalence of menstrual disorders in medical students and the factors associated with them. Material & Methods: A descriptive, cross sectional study was conducted among 100 medical students of Karimnagar aged 19-25 years from June 1, 2020 to July 31, 2020. A pretested self -administered questionnaire was used to collect demographic, menstruation and lifestyle data, which was analysed using SPSS v16.0. Results: Most common menstrual abnormalities were dysmenorrhoea (86%), Pre-menstrual Syndrome (83%) and irregular menstrual cycles (25%). 70% students perceived that stress had an effect on their periods – delayed periods (43%), painful menstruation (15%) and increased menstrual flow (11%). Conclusion: Dysmenorrhoea and pre-menstrual syndrome are found to be highly prevalent in undergraduate medical students. High levels of stress associated with medical education act as an added factor in these students. Hence a provision of flexible medical curriculum to accommodate the students’ needs is to be sought.