Lupus - an autoimmune condition that affects many different organs and body tissues. Accordingly, reducing estrogen may reduce a female's probability of breast cancer. The question is: How to lessen the estrogen level in a female's lifespan? The risk of breast cancer is quite a bit reduced in Japan than that in the United States?about one-fourth. This discrepancy might be explained by the fact that the menstrual cycle of women in the United States is approximately 26 to 29 days, when compared to average of 32 days for females in Japan. So, the length of the menstrual cycles may hold the answer to reducing cancer risk ladies, since the shorter the menstrual cycles, the less creation of estrogen, along with the lower the cancer risk.