breastfeeding can reduce the risk of breast cancer, due to endocrine changes in lactation, breast cancer is not conducive to breast cancer.
a large number of studies show that late age at first birth, birth, full-term less, are risk factors for breast cancer. After 30 years of age, the risk of breast cancer is higher than that of the pregnant women at the age of 25 years of age by a factor of 20. The birth of the 3 child than 1 ~ 5 ~ 2 fetal incidence rate of breast cancer is 5 times higher. The first time after 35 years of age, the risk of developing breast cancer was increased by a factor of 3 compared with the first woman before the age of 20. The risk of breast cancer is less than that of the childless, but the difference is not significant.
early menarche, menstrual regularity of short time, and late menopausal age, are the main risk factors of breast cancer.
40% of women in the United States diet for fat, it is susceptible to breast cancer. China’s urban survey shows that excessive intake of milk and dairy products is a risk factor for breast cancer in women. Fat can make estrogen and prolactin increase, thereby stimulating.
Although there is controversy about the
breast cancer is one of the most common cancers in women, which has exceeded the incidence of cervical cancer. According to the survey, 40 thousand people die of breast cancer each year in china". Experts said that although the exact cause of breast cancer is still not very clear, but the risk factors have made considerable progress, can provide some basis for the prevention of breast cancer.
high fat, low fiber diet, waist to hip ratio, body fat content and other factors, can increase the risk of breast cancer incidence.
, some experts point out that women who have at least one pregnancy have a 50% higher risk of developing breast cancer than women. This increased risk was not associated with the number of abortions or the history of pregnancy. Studies have shown that the age of less than 18 years of age or older than the age of 30, breast cancer risk is greater than the times of 1.75.
studies showed bilateral ovariectomy compared with natural menopause before the age of 35, the risk of breast cancer decreased about 60%.
statistics show that the age of menarche in danger 11 to 13 years old breast cancer 2 higher than women aged 17 to 3 times after menarche. The risk of breast cancer in postmenopausal women aged 55 years and older was increased by more than a factor of 3 compared with those under the age of 45, and the risk of breast cancer in postmenopausal women younger than the age of was only 1/3. The risk of breast cancer doubled after 40 years or more than those under the age of 30 years.
foreign scholars reported that high fat, low fiber diet was 2 times the risk of breast cancer, low-fat, high fiber diet. Fat age, the greater the risk of breast cancer, obesity is a risk factor for breast cancer.