This textbook provides a comprehensive overview of the human spermatozoon, tracing its journey from historical discovery to contemporary scientific understanding. The chapters cover the complexities of sperm morphology and function, providing a thorough examination that is both technical and accessible. The volume opens with the history of sperm research, and subsequent chapters focus on human spermatogenesis and the detailed structure and motility of sperm cells. Readers will gain critical insight into the factors that influence spermatogenesis, including oxidative stress, genetic influences, and lifestyle factors. The book also provides an in-depth examination of various sperm defects and their impact on fertility. Written by leading experts in the field, this work invites the reader to reflect on critical issues in male fertility and reproductive health. It provides a complete summary of the sophisticated machinery of the human spermatozoon, making it essential reading for students, researchers and technicians in reproductive biology and medicine.