Breast cancer has become the number one enemy threatening women's health. Experts indicate that the earlier breast cancer is detected, the higher the possibility of a cure. Experts advise women to conduct self-examinations of their breasts after the age of 30, preferably once a month, especially for those at high risk of breast cancer. Self-examination is best done 5-7 days after menstruation. High-risk groups for breast cancer include: (1) Those who experienced menarche before the age of 12; (2) Those who...