The MƒA Thursday Think Speaker Series brings accomplished thought leaders and experts who dive into cutting edge topics in STEM education to MƒA. In this talk, Dr. Jasmine McDonald discussed breast cancer and lifecourse epidemiology, or how socially patterned exposures during childhood, adolescence, and early adulthood, influence adult disease risk. Dr. McDonald highlighted her research on exogenous environmental exposures (e.g., infection, endocrine disruptor chemicals) during windows of cancer susceptibility (e.g., in utero, puberty, pregnancy, postpartum) and increased breast cancer risk, as well as the associated health inequities. Teachers gained new and alternative perspectives on when breast cancer risk begins and learned more about the current behavioral interventions related to equitable risk reduction.