Which women are susceptible to breast cancer?

　　Age at menarche is less than 12 years old:
　　
　　Women who have menarche at a young age suffer from breast cancer The probability is high. According to American experience, delaying the age of menarche by one year reduces the risk of breast cancer by 20%.
　　
　　Hormone stimulation:
　　
　　many women menopause Later, estrogen replacement therapy was adopted for various reasons. Many studies have found that supplementing exogenous estrogen will increase the chance of breast cancer. In addition, hormone levels such as androgens, prolactin, and serum insulin are positively related to the incidence of breast cancer.
　　
　　Drinkers:
　　
　　Alcohol is a cancer-promoting agent. Heavy drinking also increases the risk of breast cancer. Compared with non-drinkers, the risk of breast cancer increases by 11%.