Fellowship training is an advanced educational program for medical professionals, typically following residency. It allows doctors to specialize in a specific area of medicine, such as cardiology or pediatrics. During this period, fellows gain hands-on experience, conduct research, and enhance their clinical skills under the guidance of experienced mentors. Fellowship programs usually last one to three years, depending on the specialty. They are designed to prepare physicians for roles in academia, research, or specialized clinical practice. Successful completion of a fellowship often leads to board certification in the chosen specialty, enhancing career opportunities and expertise.