Abstract: Breast cancer is the most common type of cancer among women in the world. This is the second leading cause of cancer deaths in women many cells grow at the same time. but the body is keen to be the number of proliferating cells corresponds to the number of cells which dies. cancer occurs when cells grow and multiply rapidly larger than natural the world health organization and the international agency for research on the cancer report, at least, can prevent a quarter of all cancers and can treat 3/4 with current knowledge and technology.