Bone marrow donation is one of the most powerful ways to save lives, offering hope to patients battling leukemia, lymphoma, aplastic anemia, and several immune and genetic disorders. While everyone who meets medical standards can join a donor registry, male donors remain among the most requested by transplant specialists worldwide. Their biological characteristics, strong stem cell production, and increased compatibility make them especially valuable. Understanding the specific requirements helps ensure donor safety and better patient outcomes.This comprehensive guide explains the eligibility criteria, medical standards, and key considerations for males interested in becoming bone marrow donors.