What are the challenges and benefits of becoming a doctor?

Becoming a doctor requires a significant amount of education and training. Before entering medical school, a prospective physician must complete a bachelor's degree and successfully pass the Medical College Admissions Test. All physicians must complete four years of medical school, plus residency training that can run from three to seven years. Some physicians complete one to three years of fellowship training if they want to pursue a career in a highly specialized field. After meeting these requirements, doctors can still face several challenges in the course of their careers.