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
- RecruitingPhase 1/Phase 2
ASC618 Gene Therapy in Hemophilia A Patients
ASC Therapeutics
- Location
- Little Rock, AR
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteersPhase 4
Enhancing PrEP Uptake and Retention Among Latine TGW and GBM in the South Using Long-Acting Injectable PrEP
Duke University
- Location
- Durham, NC
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Intervention to Enhance PrEP Persistence
Brown University
- Location
- Atlanta, GA + 2 other US sites
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
The Interaction of Body Composition, Sex Hormones and Exercise in Men
Oklahoma State University
- Location
- Stillwater, OK
- Eligibility basics
- Ages 18–79 · Men only
- RecruitingHealthy volunteers
Urine Prostate Screening Integrated With MRI for Early Detection of Prostate Cancer, UPRISE Trial
University of Michigan Rogel Cancer Center
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 50–75 · Men only
- RecruitingHealthy volunteers
Moses 2.0 vs Magneto for HoLEP - a Randomized Controlled Trial
Northwestern University
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–100 · Men only
- RecruitingHealthy volunteers
Combatting HIV Or Other STIs Early (CHOOSE)
Westat
- Location
- San Francisco, CA + 5 other US sites
- Eligibility basics
- Ages 13–24 · Men only
- RecruitingHealthy volunteers
Evaluating the Clinical Efficacy of Thulio vs. Holmium Laser Enucleation of the Prostate
Smita De
- Location
- Cleveland, OH
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteersPhase 4
Autonomic and Renal Contributions to Hypertension With ADT
Virginia Commonwealth University
- Location
- Richmond, VA
- Eligibility basics
- Ages 40+ · Men only
- RecruitingHealthy volunteers
Urolift Pre-SBRT for Reduced Urinary Toxicity in Patients With BPH and Prostate Cancer.
Northwell Health
- Location
- Syosset, NY
- Eligibility basics
- Ages 50–99 · Men only
- RecruitingHealthy volunteersPhase 3
Screening for Prostate Cancer Using High Resolution Micro-ultrasound Versus Multiparametric Magnetic Resonance Imaging.
University of Alberta
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 50–70 · Men only
- RecruitingHealthy volunteersPhase 2
JAK Signaling in Depression and Cognition in Male Football Players
Emory University
- Location
- Atlanta, GA + 2 other US sites
- Eligibility basics
- Ages 30–55 · Men only
- RecruitingHealthy volunteers
Leveraging Chatbot to Improve PrEP in the Southern United States
Yale University
- Location
- Miami, FL + 3 other US sites
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Couples Motivational Interviewing to Reduce Drug Use and HIV Risk in Vulnerable Male Couples
Hunter College of City University of New York
- Location
- New York, NY
- Eligibility basics
- Ages 18–55 · Men only
- RecruitingHealthy volunteers
Peer Influences in Alcohol and Sexual Violence Among Marines Dyads
Georgia State University
- Location
- Atlanta, GA
- Eligibility basics
- Ages 21+ · Men only
- RecruitingHealthy volunteers
P3 Trial: Estimating the Impact of a Multilevel, Multicomponent Intervention to Increase Uptake of HIV Testing and Biomedical HIV Prevention
Columbia University
- Location
- New York, NY
- Eligibility basics
- Ages 18–65 · Men only
- RecruitingHealthy volunteers
Ejaculatory-Sparing HoLEP vs Standard HoLEP
Northwestern University
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–100 · Men only
- RecruitingHealthy volunteers
Impact of an Electronic Health Record Maintenance Alert on PSA Screening Rates in a 10-Hospital Integrated Health System
Washington University School of Medicine
- Location
- St Louis, MO
- Eligibility basics
- Ages 40–75 · Men only
- RecruitingHealthy volunteers
Male Fertility Program
University of Miami
- Location
- Miami, FL
- Eligibility basics
- Ages 18–50 · Men only
- RecruitingHealthy volunteers
Clinical, Molecular and Imaging Biomarkers in Spinal and Bulbar Muscular Atrophy (SBMA)
National Institute of Neurological Disorders and Stroke (NINDS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–120 · Men only
- RecruitingHealthy volunteers
Collecting and Studying Blood and Tissue Samples From Patients With Locally Recurrent or Metastatic Prostate or Bladder/Urothelial Cancer
University of Washington
- Location
- Seattle, WA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteersPhase 2
Evaluating Gardasil HPV Vaccine Humoral and Cellular Immune Responses in People With and Without HIV
University of Maryland, Baltimore
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–70 · Men only
- RecruitingHealthy volunteers
Alcohol and "Heat of the Moment" Sexual Decision Making
Boston University Charles River Campus
- Location
- Boston, MA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Health-E You Efficacy Trial for Male Adolescents
Johns Hopkins University
- Location
- Oakland, CA + 7 other US sites
- Eligibility basics
- Ages 13–21 · 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.