Clinical trial Recruiting at 2 sites Observational Ages 18 and up Men only

Evaluating Testicular Imaging for Azoospermia Diagnosis

Official title: Testicular Evaluation of Azoospermia Using Micro-Ultrasound

Run by Shady Grove Fertility Reproductive Science Center · NCT06941922 · Data updated 2026-11-12

This study is testing if a special type of ultrasound can help doctors see differences in the tiny tubes in the testicles of men with no sperm and help figure out why that’s happening.

Quick facts

Study typeObservational
Ages18 Years and up
SexMen only
Enrollment40 (estimated)
SponsorShady Grove Fertility Reproductive Science Center
Academic / other
Locations2 sites (Rockville, Maryland and 1 other locations)
StatusRecruiting
StartedMay 1, 2025
Main results expectedOctober 31, 2025
Study endsDecember 31, 2025
Registry record updatedJuly 11, 2025
Trial IDNCT06941922 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include men over 18 with confirmed azoospermia or post-vasectomy patients with verified azoospermia.

Probably not a fit

Patients with a history of prior microdissection of the testes or hypogonadotropic hypogonadism may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to assess the feasibility of using micro-ultrasound technology to visualize seminiferous tubules in men with azoospermia and healthy controls. By employing high-resolution imaging, the study seeks to identify differences in tubule structure that may aid in diagnosing the underlying causes of azoospermia. The study will involve imaging 40 participants, including those with obstructive and non-obstructive azoospermia, to determine if micro-ultrasound can effectively differentiate between normal and atrophic tubules. The findings will inform the design of future studies in this area.

Why it matters

Potential benefit: If successful, this study could enhance diagnostic accuracy for azoospermia, potentially improving treatment outcomes for affected patients.

How similar studies have gone: While this approach is innovative, similar studies using advanced imaging techniques have shown promise in other areas of reproductive health.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion criteria:

1. Men with azoospermia confirmed based on semen analysis
2. Post-vasectomy patients with verified azoospermia after the procedure
3. Men pre-vasectomy with proven natural fertility or with normal semen analysis
4. Males assigned at birth over the age of 18

Exclusion criteria:

1. History of prior microdissection of the testes
2. History of hypogonadotropic hypogonadism

Where it's running

  • Shady Grove Fertility
    Rockville, Maryland, United States
    Recruiting
  • University of Alberta
    Edmonton, Alberta, Canada
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.