Each ejaculatory duct is formed by the union of the vas deferens and the duct of the seminal vesicle. The two ducts, each about 2 cm long, pass forward and down through the prostate. They open into the prostatic urethra on the seminal colliculus, one on each side of the prostatic utricle.
| Location | Within the prostate, from its base to the seminal colliculus of the prostatic urethra |
|---|---|
| Parts |
|
| Nerve Supply | Prostatic plexus |
| Blood Supply | Inferior vesical artery |
| Venous drainage | |
| Lymphatic drainage |
|
Delivers sperm and seminal vesicle fluid into the prostatic urethra during emission.
Blockage of the ejaculatory ducts, from cysts, stones or scarring, causes low semen volume, painful ejaculation and infertility. It can be treated by cutting the openings through a scope (transurethral resection of the ejaculatory ducts). The ducts are a landmark during prostate surgery.
Blockage of the ducts causing low-volume, acidic semen without sperm, and sometimes pain on ejaculation.
Blood in the semen, most often from benign inflammation of the ducts, seminal vesicles or prostate.
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