Breast cancer is a disease that can sometimes lead to ovarian cancer and has caused many deaths of women. “About five to ten percent of breast cancer cases are thought to be hereditary, meaning they result from genetic abnormalities called mutations inherited from a parent.” Risks associated with early menstruation, oral contraceptives and childbearing 20 percent. (1) An environmental risk is that toxins can damage breast DNA. Over time, damaged DNA can lead to cancer. Your risk of developing breast cancer increases with age. “1 in 8 breast cancers are detected in women under 45. 2 out of 3 breast cancers are detected in women aged 55 or over, 75% more chance. these are stains on your lips and in their mouth. Women without children or who have had a child after age 30 have a slightly higher risk of breast cancer. “Breast cancer screening is an early diagnosis which increases the chances of survival and an annual mammogram after the age of 40.” Women who took diethylstilbestrol during pregnancy may have a slightly higher risk of developing breast cancer. Birth control pills also carry 40 to 50 percent higher risks because the risk of breast cancer subsides after you stop taking them. (1) Using combined hormone therapy after menopause increases the risk of breast cancer, it also increases the risk of women dying from it. . If you are overweight or obese after menopause, your risk of breast cancer increases significantly by 20 percent. Drinking alcohol can have a major effect on the development of breast cancer, with the risk increasing the more you drink. Tobacco smoke, night work, antiperspirants, bras and induced abortion. Breast cancer claims many lives in women and men of all races and...... middle of paper ...... the risk of developing a new cancer in the other breast is 3 to 4 times higher than that of another breast. recurrence of the first cancer. “Overall, white women are slightly more likely to develop breast cancer than African American women.” 5 to 10 percent of breast cancers are caused by inherited genetic mutations. “2 to 5% caused by hereditary mutations of the BRCA 1 and BRCA 2 genes.” High doses of radiation, such as to treat the disease, in women under 30 show an increased risk of breast cancer.(2) Having one risk factor, or even several, does not mean you will get the disease. If you are overweight, the link between this and breast cancer risk is complex, around 25%. "You will need to exercise as little as 1.25 to 2.5 hours per week and walking will reduce the risk of breast cancer by 18 percent."(2) High-fat diets are a high risk that causes breast cancer at exactly 50 percent..