Fellowship in Maternal-Fetal Medicine: Program Leadership

OBrienBarbara M. O'Brien, MD

Program Director
Dr. O'Brien earned her medical degree from New York Medical College. She completed her residency and fellowships in Maternal-Fetal Medicine and Medical Genetics at Tufts Medical Center. Dr. O'Brien's interests lie in clinical expertise and innovation, teaching and educational leadership.

Brett C. Young, MD

Associate Program Director
Dr. Young earned her medical degree from Dartmouth Medical School. She completed a residency at Beth Israel Deaconess Medical Center and a fellowship at Massachusetts General Hospital. Her clinical interests are the impact of maternal health on pregnancies, preeclampsia, placenta previa, and prenatal diagnosis.

Dafny M. Argueta

Program Administrator 
Phone: (617) 667-2966
Fax: (617) 667-0842
Email: dargueta@bidmc.harvard.edu


Katherine M. Johnson, MD

3rd Year Fellow
Medical School: Harvard Medical School
Residency: Beth Israel Deaconess Medical Center



Jess Hart, MD

2nd Year Fellow
Medical School: University of Massachusetts Medical School
Residency: UMASS Memorial Medical Center 2018



Liberty Reforma, MD
1st Year Fellow
Medical School: University of California San Fransico
Residency: Hospital of the University of Pennsylvania 


  • Blair Wylie, M.D., M.P.H.,Division Chief
  • Karen O'Brien, M.D.,Associate Chief
  • Ai-ris Collier, M.D.,Faculty
  • Millie Ferrés, M.D.,Geneticist/Faculty
  • Benjamin Hamar, M.D.,Faculty
  • Scott Shainker, D.O, M.S.,Assistant Director of Labor & Delivery
  • Melissa Spiel, D.O.,Faculty
  • Leanna Sudhof, MD
  • Chloe Zera, M.D., Faculty