There is no single established cause of breast cancer. Several factors have been identified to increase the risk of developing the disease in some individuals, including:
• Hormonal risk factors, such as early onset of menstruation, late menopause, and obesity and estrogen therapy after menopause;
• Individual risk factors, such as female sex and advanced age;
• Lifestyle factors, such as smoking and alcohol consumption;
• Hereditary risk factors, such as history of breast cancer among first-degree relatives.