The ampulla is the wide, tortuous final part of each vas deferens, behind the bladder. It joins the duct of the seminal vesicle to form the ejaculatory duct.
| Location | Posterior surface of the bladder, medial to the seminal vesicle, just above the prostate |
|---|---|
| Parts |
|
| Nerve Supply | Inferior hypogastric plexus |
| Blood Supply | Artery to the ductus deferens (from the superior or inferior vesical artery) |
| Venous drainage |
|
| Lymphatic drainage |
|
Stores sperm before ejaculation and adds a small amount of fluid.
Seen on transrectal ultrasound and MRI when assessing infertility and obstruction. Blockage near the ejaculatory duct reduces semen volume.
Blockage of the outflow from the ampulla and seminal vesicle causing low semen volume and infertility.
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