Long-term use of birth control pills may increase a woman’s chances of developing breast cancer, but it does not necessarily lead to breast cancer. Most birth control pills are a mixture of estrogen and progesterone. Long-term use of birth control pills may lead to endocrine disruption in women. The high level of estrogen in the body will continuously stimulate the proliferation and division of breast ductal cells through the estrogen receptors on the breast follicles, and in the process, atypical hyperplasia of breast follicles may occur, which will lead to precancerous lesions of breast cancer, and increase the chances of women developing breast cancer. Long-term use of birth control pills by fertile women or use of birth control pills by menopausal women to alleviate menopausal symptoms may increase the chance of breast cancer. Although it does not necessarily lead to breast cancer, it is recommended that this type of patients go to the Breast Surgery Department of the hospital for regular follow up checkups.