Fellowship training is an advanced postgraduate training program that provides specialized education and training to individuals who have completed their medical residency and wish to further their expertise in a specific area of medicine. Fellows typically work closely with experts in their field, gain hands-on experience in clinical practice and research, and may have opportunities to conduct their own research projects. Fellowship training often lasts one to three years and is essential for individuals pursuing careers in subspecialty areas of medicine. It is a competitive and rigorous program that helps fellows develop advanced skills and knowledge in their chosen field.