Aim: to evaluate the menstrual characteristics in relation to ovarian cancer risk overall, and in relation to the major tumour histologic subtypes. Our findings are considered in light of several current hypotheses regarding ovarian cancer pathogenesis. Material and methods: A prospective, randomized study was conducted in the Department of obstetrics and gynaecology, Narayan Medical College and Hospital, Sasaram, Bihar, India from October 2017 to January 2019. In all about 80 patients with palpable abdominal and pelvic adnexal mass with ovarian pathology were included for this study. Results: It is evident from the above table that 73 patients were married giving the incidence of 91.25% while 8.75% of cases were unmarried. Out of 80 patients, 67.5% had regular menstrual cycle, 6.25% had surgical menopause, 2.5% had lactation amenorrhoea, 7.5% had amenorrhoea of pregnancy and 13.75% had physiological menopause, Secondary amenorrhea 1.25% and Bleeding P/V after amenorrhea was1.25%. Conclusion: We conclude that there was no significant relation between menstrual history and occurrence of ovarian tumour.