Computer-assisted semen analysis is given in detail with the help of 3 well illustrated diagrams. Computer assisted semen analysis, sperm dimensions, sperm head abnormalities are given in detail. Sperm concentration, motility, curvilinear velocity, straight line velocity, average path velocity, linearity and amplitude of lateral head displacement of sperms are described comprehensively. 2 references are given at the end of the chapter for further reading.