Clinical trial Recruiting at 1 site Interventional Ages 18 and up Men only

Using round spermatids to help infertile couples conceive

Official title: Experimental Round Spermatid Injection (ROSI) to Treat Infertile Couples

Run by Wake Forest University Health Sciences · NCT04298255 · Data updated 2026-11-12

This study is testing a new way to help couples with male infertility by using special cells called round spermatids to see if they can successfully fertilize eggs and lead to pregnancy.

Quick facts

Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment50 (estimated)
SponsorWake Forest University Health Sciences
Academic / other
Locations1 site (Winston-Salem, North Carolina)
StatusRecruiting
StartedAugust 24, 2020
Main results expectedJuly 2028
Study endsJuly 2028
Registry record updatedSeptember 17, 2026
Trial IDNCT04298255 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include males diagnosed with non-obstructive azoospermia who have undergone Testicular Sperm Extraction and have round spermatids present.

Probably not a fit

Patients with obstructive azoospermia or those who have an adequate number of elongated spermatids or spermatozoa 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 research evaluates the effectiveness of Round Spermatid Injection (ROSI) in treating male infertility caused by non-obstructive azoospermia. The study focuses on gathering round spermatids from men who lack elongated spermatids or spermatozoa and using them to fertilize oocytes, similar to In Vitro Fertilization (IVF). It aims to improve the selection process of round spermatids and assess the safety and outcomes of pregnancies achieved through this method. The study is conducted at the Carolinas Fertility Institute in Winston-Salem, North Carolina.

Why it matters

Potential benefit: If successful, this approach could provide a new option for men with non-obstructive azoospermia to achieve pregnancy without resorting to sperm donation or adoption.

How similar studies have gone: Previous studies have shown some success with ROSI, but this specific approach is novel and aims to improve upon existing methods.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Males with no elongated spermatids or spermatozoa present but with round spermatids present on TESE (Testicular Sperm Extraction)
* Male diagnosed with non-obstructive Azoospermia
* Male partner ≥18
* Female partner greater than 18 years of age and less than 38 years of age or Anti Mullerian Hormone (AMH) greater than 2 ng/ml.

Exclusion Criteria:

* Males with obstructive azoospermia
* Males with presence an adequate number of elongated spermatids or spermatozoa

Where it's running

  • Carolinas Fertility Institute (CFI)
    Winston-Salem, North Carolina, United States
    Recruiting

Study contacts

  • Principal investigator: Hooman Sadri, MD, PhD — Wake Forest Institute for Regenerative Medicine (WFIRM)
  • Study coordinator: Karla M Oliver
  • Email: kaoliver@wakehealth.edu
  • Phone: 336-713-3123

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.