Who can join
Studies open only to men
These studies list male participants only in their official record. Most other studies accept everyone regardless of sex.
117 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteers
US Imaging for the Assessment of LUTS
University of Wisconsin, Madison
- Location
- Madison, WI
- Eligibility basics
- Ages 18–80 · Men only
- RecruitingHealthy volunteers
Testing a Gender-inclusive HIV Prevention Program
Center for Innovative Public Health Research
- Location
- San Clemente, CA
- Eligibility basics
- Ages 14–18 · Men only
- RecruitingHealthy volunteers
Polygenic Risk Stratification Combined With mpMRI to Identify Clinically Relevant Prostate Cancer
Adam S. Kibel, MD
- Location
- Boston, MA + 1 other US site
- Eligibility basics
- Ages 40–69 · Men only
- RecruitingHealthy volunteers
Understanding of Genetics by Men at Risk for Prostate Cancer
Mayo Clinic
- Location
- Phoenix, AZ + 2 other US sites
- Eligibility basics
- Ages 40–95 · Men only
- RecruitingHealthy volunteers
Universal Basic Income and Structural Racism in the US South: HIV Care
University of Arkansas
- Location
- Little Rock, AR
- Eligibility basics
- Ages 25+ · Men only
- RecruitingHealthy volunteers
Magnetic Resonance Imaging and Biomarkers for Muscular Dystrophy
University of Florida
- Location
- Gainesville, FL + 1 other US site
- Eligibility basics
- Ages 5–62 · Men only
- RecruitingHealthy volunteers
PrEP Intervention in Prince George's County, Maryland
George Mason University
- Location
- Fairfax, VA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Testicular Evaluation of Azoospermia Using Micro-Ultrasound
Paul Shin
- Location
- Rockville, MD
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteersPhase 4
ANCHORS Alcohol & Sexual Health Study: UH3 Project
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–30 · Men only
- RecruitingHealthy volunteers
Va Meh Du: A Sports-based Mental Health Promotion Intervention for Karenni Refugees
University of North Carolina, Greensboro
- Location
- Winston-Salem, NC
- Eligibility basics
- Ages 8+ · Men only
- RecruitingHealthy volunteers
Diet-Induced Changes in GEnetic Material
Pennington Biomedical Research Center
- Location
- Baton Rouge, LA
- Eligibility basics
- Ages 20–35 · Men only
- RecruitingHealthy volunteers
Supporting Resilience Among Re-entered Seniors
University of Louisville
- Location
- Louisville, KY
- Eligibility basics
- Ages 45+ · Men only
- RecruitingHealthy volunteers
Effect of Resveratrol Supplementation on Exercise Performance and Recovery
University of Central Florida
- Location
- Orlando, FL
- Eligibility basics
- Ages 18–40 · Men only
- RecruitingHealthy volunteers
HIV Prevention Intervention for Latino Male Couples
University of Central Florida
- Location
- Orlando, FL
- Eligibility basics
- Ages 18–100 · Men only
- RecruitingHealthy volunteers
Optimizing Infection Prophylaxis Prior to Shoulder Surgery
University of Washington
- Location
- Seattle, WA
- Eligibility basics
- Ages 18–89 · Men only
- RecruitingHealthy volunteersPhase 2
This Study is Evaluating a New Radiation Treatment Technique for Patients Who Have Had Prostate Cancer, Undergone Surgery for Cancer, and Then Have Evidence That Their Prostate Cancer Has Returned.
University of Rochester
- Location
- Rochester, NY
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteersPhase 2
PrEPsmart 2-1-1 Pilot
Public Health Foundation Enterprises, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Focal Therapy for Localized Prostate Cancer
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteersPhase 3
Intra-operative Loop Diuretics to Improve Same-day Discharge Rates After HoLEP
Northwestern University
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–89 · Men only
- RecruitingHealthy volunteers
TRANBERG® Transperineal MR/US Fusion Laser--Induced Thermal Therapy for Men With Prostate Cancer
Urological Research Network, LLC
- Location
- Hialeah, FL
- Eligibility basics
- Ages 50–80 · Men only
- RecruitingHealthy volunteersPhase 4
Optimizing Pain Control in Transurethral Resection of the Prostate
Benaroya Research Institute
- Location
- Seattle, WA
- Eligibility basics
- Ages 18+ · Men only
Questions
If I fit this group, will I qualify?
Not necessarily. Age and sex limits are only the first filter. Each study has its own inclusion and exclusion criteria, and the research team decides at screening.
Where do these age and sex limits come from?
From the eligibility section of each study’s official ClinicalTrials.gov record. We don’t infer eligibility from anything else.