What is "retrograde ejaculation"?

What is "retrograde ejaculation"?

Philip Werthman, FACS (Director, Center for Male Reproductive Medicine) gives expert video advice on: What causes premature ejaculation?; How can premature ejaculation be treated?; What causes low libido? and more...

Retrograde ejaculation is a condition where, when a man ejaculates, instead of the semen coming out through the end of the penis, it actually runs back into bladder. If you look at the male reproductive tract and its anatomy, the sperm come up through the vas deferens and then run through the ejaculatory ducts and the prostate, which is part of the male urethra. The prostate is right next to the bladder. It's probably about a centimeter or two centimeters from the bladder. The penile urethra is usually six to eight centimeters in length, so the path of least resistance for the semen to go is actually back into the bladder, and that is retrograde ejaculation.