Marriage factors
Unmarried is one of the risk factors for breast cancer. The facts show that the incidence of breast cancer is generally higher among nuns, single women, marriages later, and women with short marriage duration. The age of first birth of more than 30 years will increase the risk of breast cancer. The number of months of breastfeeding has a protective effect on the occurrence of breast cancer. Some scholars believe that lactation for more than 5 years can reduce the risk of breast cancer by 30%.
Studies have shown that the age of menarche before the age of 12 is more than four times higher than the risk of breast cancer after the age of 13 years. 45-year-old menopause than 50-year-old menopause, the risk of breast cancer decreased by 30%.
genetic factors
In existing breast cancer risk factors, family history is very important. There is a high degree of suspicion that women have the genetic predisposition to breast cancer: multiple relatives in the paternal or maternal line have breast cancer, a family history of breast and ovarian cancer, and a family history of bilateral or early breast cancer.
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Breast benign disease
The risk of breast cancer is related to the histological type of benign breast disease. Currently, "non-proliferative" and "proliferative" lesions are commonly used to distinguish different risks. Non-proliferative lesions do not increase the incidence of breast cancer, and the relative risk of breast cancer with proliferative lesions increases, especially with lobular or atypical hyperplasia of ducts.
Lifestyle factors
There is a positive relationship between breast cancer mortality and per capita annual fat consumption. Experts believe that 60% of human health conditions are related to lifestyle. In the big category of lifestyle, dietary factors account for the vast majority. A comparative analysis of the dietary composition of American residents with high incidence of breast cancer and the diet of Chinese residents with low breast cancer incidence found that the total daily consumption of total fat was 2.5 times that of Americans in China.
Studies have shown that meat, omelettes, butter, cheese, sweets, and animal fats can increase the risk of breast cancer, while green vegetables, fruits, fresh fish, and low-fat dairy products can reduce the risk of breast cancer. Clever choice of food to help you prevent breast cancer
other factors
In addition to family history and history of benign disease, the risk of breast cancer is age at menarche, age of first birth, parity, age at menopause, etc. In addition, the risk of developing cancer in the contralateral breast after one side of breast cancer is also increasing.
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