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Introduction: Breast cancer is the abnormal and disordered growth of cells of the epithelium in the mammary conducts, it has the capacity to scatter itself to any site of the organism. World-wide, its incidence has increased from 1940 being the first cause of death in women between 40 and 55 years of age. In Mexico 45.5% it is reported in minors of 50 years. Objective: To compare the correlation of risk factors for breast cancer with clinical findings between premenopause and postmenopause. Material and methods: A surway was made analytical, cross-sectional, prospective, comparative observational, in 168 women, divided in two groups of pre and postmenopause, age 30-80 years, not including those with menstrual, psychiatric or neoplasic upheaval. Risk factors and physical breast examination were done. Analysis with descriptive statistic coefficient of correlation of Spearman and Kruskal-Wallis with p=0.05. Results: Factor risk in both groups were found in the 46 and 50% respectively; it is to be remarked that nonevidence of mammary lesion was found in 56 and 66%. The correlation turned out to be weak in both groups. Conclusions: It predominates the moderate severity risk factors for breast cancer in premenopauses and postmenopauses, showing a weak correlation and without statistical significance between those and the clinical findings. [ABSTRACT FROM AUTHOR]