menopause. Other studies have not shown an
  increased risk with either oral contraceptive use
  or estrogen replacement therapy. These findings
  need further study.
• A low-calorie, low-fat (especially animal fat),
  high-fiber or Oriental-style diet may decrease
  risk.
• Controversy continues regarding breast feeding.
  Some studies suggest that breast feeding may
  reduce the risk of breast cancer, particularly in
  cultures where prolonged breast feeding (several
  years for each child) is the norm.

Factors Not Related to Breast Cancer 
• Fibrocystic breasts .
• Multiple pregnancies. 
• Coffee or caffeine intake.