What is a common cause of retrograde ejaculation?

Retrograde ejaculation occurs when semen is redirected into the bladder instead of exiting through the penis during ejaculation. This condition can result from nerve injury, particularly affecting the nerves that control the bladder neck and sphincters. Neurological damage can disrupt the normal physiological processes required for proper ejaculation, leading to semen flowing backward instead of out through the urethra.

Damage to the sympathetic nerves that typically cause the bladder neck to close during ejaculation is a key factor in retrograde ejaculation. Common causes of such nerve injury include diabetes, spinal cord injuries, and surgeries that affect the pelvic area.

While other factors like prostate enlargement, hydration levels, and certain drug side effects can influence various aspects of urinary and sexual function, they do not directly result in retrograde ejaculation as a primary mechanism. Instead, they may contribute to other conditions or symptoms without the specific neurological implications associated with nerve injury. Understanding the mechanisms involved in retrograde ejaculation helps clarify the impact of nerve integrity on sexual function.