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 type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | Men only |
| Enrollment | 50 (estimated) |
| Sponsor | Wake Forest University Health Sciences Academic / other |
| Locations | 1 site (Winston-Salem, North Carolina) |
| Status | Recruiting |
| Started | August 24, 2020 |
| Main results expected | July 2028 |
| Study ends | July 2028 |
| Registry record updated | September 17, 2026 |
| Trial ID | NCT04298255 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.
-
Fish oil supplementation to improve sperm quality in men
This study is testing whether taking fish oil supplements can improve sperm quality in men who have low semen quality.
-
Creating human sperm in a lab using testicular organoids
This study is testing if scientists can create human sperm in a lab using special tissue samples from men to help understand and treat male infertility.
-
Using artificial intelligence to improve oocyte and embryo quality assessment in fertility treatments
This study is testing whether using artificial intelligence can help improve the quality of eggs and embryos in fertility treatments like IVF to boost the chances of pregnancy.
-
ZyMōt sperm selection method's effect on embryo quality
This study is testing a new way to select sperm to see if it can help couples undergoing IVF have better embryo quality and higher chances of pregnancy.
-
Improving male fertility with prenatal vitamins based on sperm test results
This study is testing if taking Power Prenatal vitamins can improve sperm quality in men who have low sperm counts.
-
Improving sperm motility in men with spinal cord injuries
This study is testing if a medication called probenecid can help improve sperm movement in men with spinal cord injuries who are struggling with infertility.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.