Medical Articles · 4 min read
Does a Vasectomy Affect Testosterone or Sexual Function?
In brief
No. A vasectomy does not lower testosterone, reduce sex drive or affect erections or orgasm. The testicles continue to produce hormones normally, and because sperm make up only a small part of semen, the volume and appearance of semen change very little.
Medically reviewed by Dr. Atip Chatsudthipong, MD on
Written by Editorial teamPublished Updated
Does a vasectomy lower testosterone?
No. Testosterone is made in the testicles and released directly into the bloodstream — it does not travel through the vas deferens. A vasectomy only blocks the transport of sperm, so hormone levels are unchanged.
Will erections, libido or orgasm change?
No physical change to erections, sex drive or the sensation of orgasm is expected. Some men report greater sexual satisfaction because they no longer worry about unplanned pregnancy.
Will semen look different?
Very little. Most of the volume of semen comes from the seminal vesicles and prostate, which are unaffected. After a vasectomy, semen simply no longer contains sperm — which is why a semen test is needed to confirm success.
Does a vasectomy affect long-term health?
According to the AUA vasectomy guideline, vasectomy is not a risk factor for prostate cancer or heart disease. A small minority of men develop chronic scrotal pain. A vasectomy does not protect against sexually transmitted infections. More in the vasectomy guide.
Frequently asked questions
Can a vasectomy cause erectile dysfunction?
No. A vasectomy does not affect the nerves or blood flow responsible for erections.
References
This information is for general education and does not replace a consultation with a qualified doctor. If you have severe symptoms, seek emergency care (in Thailand, call 1669). See our medical disclaimer.