Dr. Deirdre Lyell is the Co-Director and Co-Principal Investigator of the California Maternal (CMQCC) and Perinatal (CPQCC) Quality Care Collaboratives and the Dunlevie Professor of Obstetrics and Gynecology at Stanford and brings more than 25 years of clinical experience in maternal-fetal medicine and obstetrics and gynecology. She has conducted impactful, practice changing research in clinical obstetrics, racial and ethnic disparities in obstetrics, anemia, severe maternal morbidity, placenta accreta spectrum and prematurity prevention. She has led QI initiatives locally and at scale, working with community members, people with lived experience and providers to ensure that everyone receives the same care. At Stanford, she serves as Director of the Perinatal Epidemiology and Population Health in the Dunlevie Maternal-Fetal Medicine Center; Medical Director of Labor and Delivery; Associate Division Director of Maternal-Fetal Medicine; Medical Director or the Program in Placental Disorders; and project lead for the NIH-funded Center of Excellence award, Preventing Inequities in Hemorrhage-related Severe Maternal Morbidity. Nationally, Dr. Lyell is a founding board member of the Pan American Society for Placenta Accreta Spectrum, a board member of the Society for Maternal-Fetal Medicine Foundation, an examiner for the American Board of Obstetrics and Gynecology MFM specialty boards, and has a grant reviewer for the National Institutes of Health.