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, Anugrah Narayan Magadh Medical College, Gaya, Bihar, India for 1 year. In all about 80 patients with palpable abdominal and pelvic adnexal mass with ovarian pathology were included for this study. Results: Out of 120 patients 41.67% was 20-30 years age group and followed by 30-40 years. It is evident from the above table that 112 patients were married giving the incidence of 93.33% while 6.67% of cases were unmarried. In this study we found evident that 65.83% had regular menstrual cycle, 5.83% had surgical menopause, 3.33% had lactational amenorrhoea, 6.67% had amenorrhoea of pregnancy and 10% had physiological menopause, Secondary amenorrhea 1.67% and Bleeding P/V after amenorrhea was 1.67%. Conclusion: We conclude that there was no significant relation between menstrual history and occurrence of ovarian tumour.