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7,120 recruiting studies with US sites, from the official ClinicalTrials.gov registry (refreshed Oct 26, 2026). No sign-up needed.
Most recently updated studies · page 135 of 297
- RecruitingHealthy volunteers
Helpline Pilot Factorial Trial
The National Center on Addiction and Substance Abuse at Columbia University
- Location
- New York, NY
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Home Visitation Enhancing Linkages Project in Kansas
The National Center on Addiction and Substance Abuse at Columbia University
- Location
- New York, NY
- Eligibility basics
- Ages 18+ · Women only
- RecruitingHealthy volunteersPhase 3
Hormone Replacement Therapy in Adolescents With Premature Ovarian Insufficiency
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 11–19 · Women only
- RecruitingHealthy volunteers
Weight Loss Through Mayo Clinic Diet
Mayo Clinic
- Location
- Rochester, MN
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
Feasibility Trial of Combination of Obstetrical Carrier Screening and Hereditary Cancer Screening
Columbia University
- Location
- New York, NY
- Eligibility basics
- Ages 18–55 · Women only
- RecruitingHealthy volunteers
Cardiac Structure and Function in MPS
Children's Hospital of Orange County
- Location
- Orange, CA + 1 other US site
- Eligibility basics
- Ages 0 mo–99
- RecruitingHealthy volunteers
Applying CSNAT in HBPC as an Approach to Elder Mistreatment Risk Reduction
The University of Texas Medical Branch, Galveston
- Location
- Galveston, TX
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Momentary Coping Prompts and Hair Steroids in College Students
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–22
- RecruitingHealthy volunteers
Just-in-Time Coping Prompts for Reactive Digital Behavior in College Students
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–22
- RecruitingHealthy volunteers
Parkinson's Disease in Type 1 Gaucher Disease
Icahn School of Medicine at Mount Sinai
- Location
- New York, NY
- Eligibility basics
- Ages 40+
- RecruitingHealthy volunteers
Improved Methods of Cell Selection for Bone Marrow Transplant Alternatives
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
Natural History Study of Biomarkers in Pulmonary Arterial Hypertension
National Institutes of Health Clinical Center (CC)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Neural and Psychological Mechanisms of Pain Perception
National Center for Complementary and Integrative Health (NCCIH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteers
Sociocultural & Biobehavioral Influences on Pain Expression and Assessment
National Center for Complementary and Integrative Health (NCCIH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
Outcome Inference in the Sensory Preconditioning Task in Opioid-Use Disorder
National Institute on Drug Abuse (NIDA)
- Location
- Baltimore, MD
- Eligibility basics
- Ages 21–60
- RecruitingHealthy volunteers
Androgen Receptor, Implications for Health and Wellbeing: Natural History Study of Individuals With Androgen Insensitivity
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 8–99
- RecruitingHealthy volunteers
Overlapping Pain Trajectory Study
Children's Hospital Medical Center, Cincinnati
- Location
- Cincinnati, OH
- Eligibility basics
- Ages 10–19
- RecruitingHealthy volunteers
Effect of Vestibular Perceptual Learning on Vestibular Thresholds and Balance
Ohio State University
- Location
- Columbus, OH
- Eligibility basics
- Ages 65–89
- RecruitingHealthy volunteers
Preventing Depression of Chinese American Adolescents by RRE
Northeastern University
- Location
- Boston, MA
- Eligibility basics
- Ages 14–18
- RecruitingHealthy volunteers
Use of Nicotine Pouches Among Daily Smokers
Milton S. Hershey Medical Center
- Location
- Hershey, PA + 1 other US site
- Eligibility basics
- Ages 21–70
- RecruitingHealthy volunteers
Development of MRF for Characterization of Brain Tumors After Radiotherapy
Case Comprehensive Cancer Center
- Location
- Cleveland, OH + 1 other US site
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
The Effects of Auditory Stimulation During Sleep on Brain Networks in Schizophrenia
Massachusetts General Hospital
- Location
- Charlestown, MA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Multifocal HD-tDCS and Motor Function
University of Michigan
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 65–85
- RecruitingHealthy volunteers
ShotBlocker During Intramuscular Injection Randomized Control Trial
Lauren Fortier
- Location
- Worcester, MA
- Eligibility basics
- Ages 8 mo–10 mo
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