This chapter considers the various causes of male infertility and the input of
the male into the overall process of fertility treatment. Fertility treatment is unique in
that it involves 2 patients at the same time and the role of these patients is equally
important to the overall success of the treatment. The male plays a critical role in
fertility treatment, and this role may be down-played by some fertility clinics to the
point at which the male feels disengaged from the treatment process. This is a bad
thing.