Normally when a man ejaculates, sperm travels from the testicles along a series of delicate tubes, called the ejaculatory ducts, to mix with semen (the fluid that protects and feeds the sperm). The sperm and semen mix is then ejected out through the penis during orgasm.
An ejaculatory duct obstruction is where there is a blockage or inflammation of the tubes which the sperm travel along. This blockage prevents some or all of the sperm mixing with the semen and from being ejaculated out of the penis. With little or no sperm in the semen, you cannot fertilise the woman’s egg.
Ejaculatory duct obstruction can cause pelvic pain, especially after ejaculation. You may notice a greatly reduced amount of semen, or none at all when ejaculating. Also, an EDO changes the makeup and consistency of your semen, which you may notice as being overly fluid or runny.