Successful women may be more likely to develop breast cancer - and stress at work, including prejudice, discrimination, and resistance, could be to blame.
Women in professional jobs had a near 70 per cent higher risk of breast cancer than other women, according to new research.
The research, based on a 55-year study of women who were in their thirties in the 1970's, links job stress and cancer, and shows that the longer a woman held the job, the greater the risk.
The researchers say that while women going into management in the 1970s were breaking new ground, the same kind of stress affects women today.
"Women who entered managerial occupations in the 1970's experienced prejudice and discrimination due to prevailing cultural attitudes that men made better leaders than women," says Dr Tetyana Pudrovska, who led the study.