Prevalence Definition and Classification of Infertility -- Sperm analysis interpretation -- Diagnosis of Infertility -- General therapeutic approach to male infertility -- Azoospermia -- Varicocele and Infertility -- Chromosomic causes of infertility -- Male idiopathic (oligo)±(astheno)±(terato)-spermia -- Obesity and male infertility -- Unexplained couple infertility (male role) -- Inflammatory Infertility -- Testicular Pathology -- Endocrine infertility -- Iatrogenic infertility -- Dietary Complements and phytotherapy -- Environmental pollution and infertility -- The role of the andrologist in assisted reproduction -- Sexual problems and infertility.