Hormonal contraceptives linked to small increase in breast cancer risk, study suggests.
A new study by researchers at the University of Oxford found that all hormone contraceptives, including progestagen-only "minipills," carry a small "excess risk" of breast cancer, but the overall risk remains low. Progestagen-only contraceptives are associated with a 20% to 30% relative risk for breast cancer, which aligns with previous research on combined hormone contraceptives. The study does not indicate that hormonal contraceptives cause breast cancer but rather investigated potential links to the disease.