If both<unk> <unk> s are completely obstructed, affected men will demonstrate male infertility due to aspermia/azoospermia. They will suffer from a very low volume of semen which lacks the gel-like fluid of the seminal vesicles or from no semen at all while they are able to have the sensation of an orgasm during which they will have involuntary contractions of the pelvic musculature. This is contrary to some other forms of anejaculation. In addition, it is reported to be a cause for pelvic pain, especially shortly after ejaculation. In case of proven fertility but unresolved pelvic pain, even one or both partially obstructed<unk> <unk> s may be the origin of pelvic pain and oligospermia.<unk>  may result in a complete lack of semen (aspermia) or a very low-volume semen (oligospermia) which may contain only the secretion of accessory prostate glands downstream to the orifice of the<unk> <unk> s. In addition to the congenital form which is often caused by cysts of the müllerian<unk>  the<unk>  can be acquired due to an inflammation caused by chlamydia, prostatitis, tuberculosis of the prostate and other pathogens. In addition, calculus was reported to mechanically block the<unk> <unk> , leading to infertility. However, in many patients, there is no history of an inflammation and the underlying cause simply remains unknown.
Ejaculatory duct obstruction
Penile torsion
Prostate hypoplasia
Male accessory gland infection
Testicular trauma
Müllerian agenesis
Urethral caruncle
Fallopian tube obstruction