She earned her B.S. from the University of Notre Dame and her M.D. from Washington University in St. Louis. She has also completed the Master of Science in Clinical Investigation program at Vanderbilt. She is a board certified pediatrician and clinical geneticist who is conducting translational research in the area of pediatric pharmacogenetics. McGregor is using her Translational Scholar Career Award in Pharmacogenomics and Personalized Medicine award to investigate the role of MTRNR1 mutations in aminoglycoside induced neonatal hearing loss. In parallel, she studies the perceptions and attitudes of families regarding pharmacogenetics in the pediatric population.