School of Medicine

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  • Stephanie A. Leonard

    Stephanie A. Leonard

    Assistant Professor (Research) of Obstetrics and Gynecology (Maternal Fetal Medicine) and, by courtesy, of Anesthesiology, Perioperative & Pain Medicine

    BioStephanie Leonard, PhD, MS, is an Assistant Professor in the Dunlevie Maternal-Fetal Medicine Center for Discovery, Innovation, and Clinical Impact ( She is also affiliated with the California Maternal Quality Care Collaborative ( and the Stanford Maternal and Child Health Research Institute.

    The goal of Dr. Leonard’s research is to advance equitable, positive health experiences and outcomes for pregnant individuals and newborns. She is interested in applying transdisciplinary methods to perinatal health research, with a focus on studying pregnancy-related morbidities in large data sources. Currently, her primary research interests are in building an infrastructure for distributed data network studies of perinatal health and improving treatment of chronic hypertension in pregnancy. To this end, she co-launched the OHDSI Pregnancy and Reproductive Health Work Group ( and collaborates closely with the Harvard Program on Perinatal and Pediatric Pharmacoepidemiology ( She also serves as a collaborator and mentor on a variety of obstetrics studies, including clinical trials, prospective and retrospective observational studies, and qualitative studies. Dr. Leonard's research program is currently funded by NHLBI (K01) and NICHD (U54).

    Dr. Leonard trained in epidemiology at UCLA (MS) and UC Berkeley (PhD), where her research focused on nutrition in pregnancy and was completed in partnership with the WIC program and the Nutrition Policy Institute. She completed a postdoc in Neonatal and Developmental Medicine at Stanford as part of the Stanford Center for Population Health Sciences.

  • Deirdre J. Lyell, M.D.

    Deirdre J. Lyell, M.D.

    Dunlevie Endowed Professor of Maternal-Fetal Medicine

    Current Research and Scholarly InterestsPreterm labor prevention and management, preeclampsia prevention and treatment, short and long-term impact of surgical techniques at cesarean, depression during pregnancy, fetal heart rate monitoring and long-term neurologic outcome, randomized clinical trials.