Diagnosis and management of ejaculatory duct obstruction.

Ejaculatory duct obstruction is a rare but correctable cause of male infertility. Complete ejaculatory duct obstruction may be diagnosed by transrectal ultrasonography and the presence of numerous sperm within the seminal vesicles of an azoospermic patient. Partial ejaculatory duct obstruction is difficult to document and therapy of this disorder should be considered investigational.