Wosnitzer MS, Goldstein M. Obstructive azoospermia. Urol Clin North Am 41(1): 83-95, 2014. (PubMed: 24286769)AbstractObstructive azoospermia accounts for 40% of azoospermia and results from obstruction of the excurrent ducts (due to many causes) at any location between the rete testis and the ejaculatory ducts. The diagnosis of obstructive azoospermia (OA) requires a stepwise approach to differentiate it from nonobstructive OA and to formulate management options. Localization of the site of... Read More