The precise causes of breast cancer are unclear, but we know the main risk factors. Still, most women considered at high risk for breast cancer do not get it, while many with no known risk factors do. Some risk factors for breast cancer are things you cannot change, such as being born female or getting older. These make your risk of breast cancer higher. Here are some causes of breast cancer: 1. Being a woman 2. Growing older 3. Family history 4. Being overweight 5. Alcohol 6. Hormone replacement therapy (HRT) 7. Oral contraceptive 8. Having a child late in age or not having children 9. Age at puberty or menopause If you worried about your breast health or breast cancer, call our help desk on (02) 9311 4044 or by email at [email protected]