While smoking is a risk factor for all types of cancer, it is significantly associated with breast cancer in women.

Research shows that mothers who breastfeed have a lower risk of developing pre and postmenopausal breast cancer.

According to the Centre for Disease Control, 1 in every 100 breast cancer cases in the United States occurs in men.

Higher levels of estradiol in the body are associated with an increased risk of breast cancer and uterine cancer.

Some genes promote higher growth of estrogen receptors during menopausal hormone therapy. This increases the risk of ER-positive breast cancer.

Menopause does not cause breast cancer, but the risk of developing breast cancer increases as the woman ages.