Transrectal ultrasound (TRUS)
Quick answer: A transrectal ultrasound uses a thin probe in the back passage to give a close view of the prostate and seminal vesicles. Doctors order it for prostate problems, and in some men with very low or no sperm to look for blocked ducts.
- SampleImaging (no sample)
- TakesAbout 15 to 20 minutes
- Before the testFollow the instructions you are given, which may include an enema before the scan.
- In fertility careIn male infertility with a very low semen volume or no sperm, TRUS can look for blocked ejaculatory ducts.
How the test is done
- 1Follow any bowel preparation you are given, such as an enema
- 2You lie on your left side with knees drawn up towards your chest
- 3A lubricated, covered probe about the width of a finger is placed into the back passage
- 4The probe is moved gently to view the prostate and seminal vesicles
What your results can mean
Reading your report
A sonologist or radiologist reports on the scan, and your doctor will explain what the findings mean for you.
If the result is outside the usual range
A TRUS can show an enlarged prostate, a cyst or blockage of the ejaculatory ducts, swollen seminal vesicles, or areas that may need further tests. In men with very low semen volume or no sperm, it helps look for a blockage.
Who usually has this test
Men with prostate symptoms or a raised PSA, and men with a very low semen volume or no sperm on semen analysis.
Risks and aftercare
There is no radiation; you may feel pressure and an urge to open your bowels during the scan, and slight spotting from the back passage can happen.
Names and options
Also called: TRUS, transrectal scan, prostate ultrasound
Listed by the hospital as
- ULTRASOUND SCAN TRUSS
Questions about this test
Why is a TRUS done for male infertility?
In some men with very low semen volume or no sperm, a blockage near the prostate stops sperm getting through. TRUS can show blocked ducts or cysts that may be treatable.
Does a TRUS hurt?
Most men feel pressure and discomfort rather than pain. Breathing slowly and staying relaxed helps, and you can ask the doctor to pause.
Is a TRUS the same as a prostate biopsy?
No, a TRUS alone only takes pictures. A biopsy takes tissue samples and is a separate procedure, though it may use the same probe to guide it.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
Reception
Waiting area
IVF lab
This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.