Ellen Roelfsema graduated with honours from the Faculty of Veterinary Medicine, Utrecht University in 1999 and started her training in Equine Internal Medicine in 2000 at the Department of Equine Internal Medicine. The residency program was combined with a PhD in Equine Exercise Physiology  in 2002. In 2006 she was registered as specialist in Equine Internal Medicine by the KNMvD (Royal Netherlands Veterinary Association, RNVA) and in 2007 she successfully completed her PhD on endocrinological and behavioral adaptations to experimentally induced physical stress in horses. In 2012 she passed the specialist exams of the European College of Equine Internal Medicine.

Currently, Dr. Roelfsema is assistant professor at the Department of Equine Internal Medicine, Utrecht University where she works as a specialist in the University Clinic for Horses and has teaching as well as research responsibilities.

Clinical interest: equine internal medicine, donkey medicine, metabolic and endocrinological diseases and poor performance, digestive sytem.

Research interest: endocrinological and metabolic disorders (EMS, PPID), laminitis, equine exercise physiology, digestive system.