Infertility is a major increasing concern. As the male factor contributes to about half of the infertility cases, sperm analysis is extremely important for diagnosis and investigation of infertility. In this book, the cytometric techniques used to evaluate sperm DNA/chromatin integrity together with some other functional properties of the male gamete are described and advantages and limitations are discussed. In addition, the authors provide an overview of how antioxidative and redox systems participate in spermatogenesis and in pathological conditions, such as heat stress, in the testes....