Breast cancer is seldom cased by a single event and there’s no one single drug which will turn this ailment off or cure it. On the other hand a single factor has higher weight age in relation to causing breast cancer. Mountains of investigation have shown that an excessive amount of female hormone estrogen in one form or another might have an important role to learn in the reason for this ailment. Prevention of excess estrogen may reduce the probability of developing breast cancer. This phenomenon is known as estrogen dominance.