Clinical trial Recruiting at 1 site Interventional Ages 16 to 80 Men only

Needle aspiration of sperm from the testis in men with azoospermia

Official title: Rete Testis Needle Aspiration for Retrieval of Sperm in Men With Azoospermia Using Ultrasound Guidance

Run by Hadassah Medical Organization · NCT02418832 · Data updated 2026-11-12

This study tests if a special needle procedure can help men with no sperm in their semen produce sperm from their testis for use in fertility treatments.

More Azoospermia trials

Quick facts

Study typeInterventional
Ages16 Years to 80 Years
SexMen only
Enrollment150 (estimated)
SponsorHadassah Medical Organization
Academic / other
Locations1 site (Jerusalem)
StatusRecruiting
StartedJuly 28, 2018
Main results expectedDecember 31, 2025
Study endsDecember 31, 2030
Registry record updatedMarch 4, 2025
Trial IDNCT02418832 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are men diagnosed with obstructive or non-obstructive azoospermia who are seeking sperm cell aspiration for IVF.

Probably not a fit

Patients who are healthy and non-azoospermic, or those unsuitable for the TEFNA procedure, will 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 study investigates the effectiveness of ultrasonically guided Rete Testis needle aspiration to improve sperm production in men diagnosed with azoospermia. The procedure involves aspirating sperm from the Rete Testis, which is expected to contain a significant number of sperm cells, particularly in cases of obstructive azoospermia. Participants will undergo the aspiration procedure, and the samples will be analyzed for sperm viability. If successful, the sperm can be used for cryopreservation or fertilization in assisted reproductive technologies.

Why it matters

Potential benefit: If successful, this approach could enhance sperm retrieval rates for men with azoospermia, improving their chances of fathering children.

How similar studies have gone: While similar approaches have been explored, this specific technique of Rete Testis aspiration is relatively novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Men with Obstructive/Non-Obstructive Azoospermia who turned to sperm cell aspiration for IVF and were found suitable for TEFNA and signed consent form.

Exclusion Criteria:

* healthy, non-azoospermic men
* men who are unsuitable for the TEFNA procedure
* men who don't sign the Informed Consent

Where it's running

  • Hadassah University Medical Center, Ein Kerem
    Jerusalem, Israel
    Recruiting

Study contacts

  • Principal investigator: Benjamin E. Reubinoff, MD PhD — Hadassah University Medical Center
  • Study coordinator: Benjamin E. Reubinoff, MD PhD
  • Email: benjaminr@ekmd.huji.ac.il
  • Phone: 972-2-677-7485

Similar studies

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

  • Identifying genetic variants in non-obstructive azoospermia and primary ovarian insufficiency

    This project will collect DNA from adults with NOA, oligospermia, or POI to try to find gene changes that may cause their infertility.

    Recruiting at 2 sites National Institutes of Health Clinical Center (CC) · Bethesda, Maryland and 1 other locations · NCT07357701

  • IntelliWell: AI imaging to find ultra-rare sperm in testicular tissue

    This will try an AI-assisted imaging platform to find rare sperm in testicular samples from men with non-obstructive azoospermia when standard processing finds no sperm.

    Recruiting Brigham and Women's Hospital · Boston, Massachusetts · NCT07074015

  • Evaluating Testicular Imaging for Azoospermia Diagnosis

    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.

    Recruiting at 2 sites Shady Grove Fertility Reproductive Science Center · Rockville, Maryland and 1 other locations · NCT06941922

  • Enhancing fertility using stem cell therapy for gonadal dysfunction

    This study is testing if stem cell therapy can help people with gonadal failure, like testicular or ovarian issues, improve their hormone levels and fertility when other treatments haven't worked.

    Recruiting Jumeirah American Clinic · Dubai, Dubai · NCT06841328

  • Using platelet rich plasma to treat infertility in men

    This study is testing if using platelet-rich plasma injections can help men with infertility, specifically those who have had trouble retrieving sperm, improve their chances of successful sperm extraction and IVF.

    Recruiting Stanford University · Stanford, California · NCT05479474

  • Maternal MT-ND1 Mutation and Male Infertility

    Researchers look at whether a mitochondrial MT-ND1 variant inherited from mothers is linked to very low or absent sperm production in men with idiopathic infertility.

    Recruiting The Third Affiliated Hospital of Guangzhou Medical University · Guangzhou, Guangdong · NCT07691827

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.