What are the risk factors for breast cancer

So far the cause of breast cancer is not entirely clear, but often in patients with breast cancer or a majority of "relevant factors" in which there is some risk of it more » Well-known female breast cancer experts cautioned fellow citizens should pay attention to the 10 "risk factors" are: 1. Menarche early (12 years old to menstruation), late menopause (after 55-year-old post-menopausal); 2. Not sterile, not pregnant, the first child of childbearing age more than 35 years of age; 3. Although fertility but not breast-feeding. Or breast-feeding time is short; 4. A family history of breast or ovarian cancer; 5. Post-menopausal women. Receive estrogen replacement therapy: 6. Middle-aged especially after menopause, the weight continued to rise: 7. A history of breast dysplasia; 8. Depressed, introverted character, work pressure; 9.　carnivore, Jiandan, butter, cheese, animal fats, and other high-fat diet, drink three times a day (more than 15 grams of alcohol) above; 10. Childhood had received radiation therapy.