This practical and concise guide provides a step-by-step approach to every aspect of the interpretation of semen analysis results. While other books focus on basic semen analysis protocol and techniques, few books then go on to actually interpret these results and provide useful guidance on the significance of different results for infertility assessment. This guide takes a systematic, hands-on approach to identification of the ranges of abnormality that contribute to male subfertility. It also defines basic concepts, provides clinically essential reference values, and elucidates the often subtle relationships among many sperm characteristics. Once conclusions are reached, the guide offers recommendations for appropriate referral and additional options. Inclusion of vignettes from a wide range of real-life case reports based on the author's own experiences help to illustrate key points. This practical guide is an invaluable resource for all clinicians, scientists, and laboratory professionals working with infertile patients.