Azoospermia is the medical condition of a man whose semen contains no sperm.[1] It is associated with male infertility, but many forms are amenable to medical treatment. In humans, azoospermia affects about 1% of the male population[2] and may be seen in up to 20% of male infertility situations in Canada.[3]
In a non-pathological context, azoospermia is also the intended result of a vasectomy.[4]
^Berookhim, BM; Schlegel, PN (February 2014). "Azoospermia due to spermatogenic failure". The Urologic Clinics of North America. 41 (1): 97–113. doi:10.1016/j.ucl.2013.08.004. PMID24286770.