Who can join
Studies for younger adults
These studies accept adults from 21 or younger and set an upper age limit of 45 or below, so they are aimed at younger adults. Being in the age range does not mean you qualify; screening decides.
674 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- Recruiting
Effectiveness of the SoundHeal Multi-Sensory Integrative Therapy Among Justice-Involved Youth
SoundHeal
- Location
- San Luis Obispo, CA
- Eligibility basics
- Ages 12–18
- Recruiting
Prenatal Study in Healthy Pregnant Women
Perelel Inc.
- Location
- Chicago, IL
- Eligibility basics
- Ages 21–40 · Women only
- RecruitingPhase 3
Fontan Udenafil Exercise Longitudinal Assessment Trial - 2
Mezzion Pharma Co. Ltd
- Location
- Phoenix, AZ + 34 other US sites
- Eligibility basics
- Ages 12–18
- Recruiting
An Open-Label Study to Evaluate the Effect of Elix Cycle Balance & Elix Daily Harmony on Fibroid-related Symptoms
Zenchi, Inc.
- Location
- Las Vegas, NV
- Eligibility basics
- Ages 20–45 · Women only
- Recruiting
Reducing Pregnancy Risks: The Mastery Lifestyle Intervention
Microgen LLC
- Location
- Webster, TX
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingPhase 2/Phase 3
Safety and Efficacy of Tideglusib in Congenital or Childhood Onset Myotonic Dystrophy
AMO Pharma Limited
- Location
- Little Rock, AR + 5 other US sites
- Eligibility basics
- Ages 6–45
- Recruiting
Pediatric Down Syndrome Post-Approval Study
Inspire Medical Systems, Inc.
- Location
- Houston, TX
- Eligibility basics
- Ages 13–18
- Recruiting
MASA Valve Early Feasibility Study
PECA Labs
- Location
- Peoria, IL + 4 other US sites
- Eligibility basics
- Ages 0 mo–22
- RecruitingHealthy volunteers
Characterization of Nociception Phenotype in Individuals With Intellectual Disability
National Institutes of Health Clinical Center (CC)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 8–30
- RecruitingHealthy volunteers
Screen Smart: Using Digital Health to Improve HIV Screening and Prevention
Children's Hospital Medical Center, Cincinnati
- Location
- Columbus, OH
- Eligibility basics
- Ages 15–21
- RecruitingHealthy volunteers
Post-Operative Cesarean Section Cosmesis
Wake Forest University Health Sciences
- Location
- Winston-Salem, NC
- Eligibility basics
- Ages 18–44 · Women only
- RecruitingHealthy volunteers
Evaluating the Effects of an Electrical Stimulator on Improving the Walking Ability of Children With Cerebral Palsy
University of Nebraska
- Location
- Omaha, NE
- Eligibility basics
- Ages 7–40
- RecruitingHealthy volunteers
Neural Mechanisms of Real-world Emotions and Internalizing
University of Miami
- Location
- Coral Gables, FL
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
A Longitudinal Investigation of the Endocrine and Neurobiologic Events Accompanying Puberty
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 7–35
- RecruitingHealthy volunteers
Characterization and Treatment of Adolescent Depression
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 11–25
- RecruitingHealthy volunteers
Acute Cryotherapy on Musculoskeletal Function and Biomarkers
University of Texas, El Paso
- Location
- El Paso, TX
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
Rise & Thrive: Community-Engagement Intervention for Stress and Depression in Youth.
Ann & Robert H Lurie Children's Hospital of Chicago
- Location
- Chicago, IL
- Eligibility basics
- Ages 15–20
- RecruitingHealthy volunteers
Repetitive Transcranial Magnetic Stimulation on Motor Function and Meta-Plasticity in Cerebral Palsy: TMS-EEG Study
Cook Children's Health Care System
- Location
- Fort Worth, TX
- Eligibility basics
- Ages 6–20
- RecruitingHealthy volunteers
Trial Evaluating Nutritional Fiber in Digestive Symptoms of Endometriosis
LOAM Science
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteersPhase 2
Study of Cross-Cutting E-Health Prevention Approaches
University of New Hampshire
- Location
- Durham, NH
- Eligibility basics
- Ages 18–24
- RecruitingHealthy volunteers
Oxygen Toxicity: Mechanisms in Humans
Duke University
- Location
- Durham, NC
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Socialization To Enrich Participation & Support Sexuality for Young People With I/DD
City University of New York, School of Public Health
- Location
- New York, NY
- Eligibility basics
- Ages 16–27
- 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 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
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.