The contents of estrogen receptor (ER) and progesterone receptor (PgR) in 323 primary breast cancers were analysed with respects to the influence of a patients menopausal status, age, body weight, height, childbirth, abortion, size of tumor, node involvement and pathological diagnosis. Influence of menopausal status on the distribution of ER indicate that 68% of premenopausal women and 67% of postmenopausal women were ER positive, while only 44% paramenopausal women were ER positive. ER level was found to be higher in postmenopausal than in premenopausal women. In postmenopausal women, 87% of overweight (55kg and more over patients), 52% of non-overweight were ER positive. There was no significant correlation between ER or PgR rate and height, childbirth, abortion, size of tumor, axillary node involvement, pathological diagnosis.