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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 138 of 297
- RecruitingHealthy volunteers
Screening for Research Participants
National Eye Institute (NEI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–100
- RecruitingHealthy volunteers
Serum Biomarkers to Characterize the Effects of Therapy on Ovarian Reserve in Premenopausal Women With Early-stage Breast Cancer or BRCA Mutations
Memorial Sloan Kettering Cancer Center
- Location
- Basking Ridge, NJ + 6 other US sites
- Eligibility basics
- Ages 18–44 · Women only
- RecruitingHealthy volunteers
Etiology, Pathogenesis, and Natural History of Idiopathic CD4+ Lymphocytopenia
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Collection of Human Samples to Study Hairy Cell and Other Leukemias, and to Develop Recombinant Immunotoxins for Cancer Treatment
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Comprehensive Omics Analysis of Pediatric and Adult Solid Tumors and Establishment of a Repository for Related Biological Studies
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 1 mo+
- RecruitingHealthy volunteers
Imaging Techniques in MRI
National Institutes of Health Clinical Center (CC)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
VRC 900: Evaluation of Tissue-Specific Immune Responses in Adults 18 Years of Age and Older
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Defining the Brain Phenotype of Children With Williams Syndrome
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 5–99
- RecruitingHealthy volunteers
Study of the Effect of Innate on the Inflammatory Response to Endotoxin
National Institute of Environmental Health Sciences (NIEHS)
- Location
- Research Triangle Park, NC
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Natural History Evaluation of Charcot Marie Tooth Disease (CMT) Types CMT1B, CMT2A, CMT4A, CMT4C, and Others
Michael Shy
- Location
- Los Angeles, CA + 17 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Genetics of Charcot Marie Tooth (CMT) - Modifiers of CMT1A, New Causes of CMT2
University of Iowa
- Location
- Los Angeles, CA + 17 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Studies of Disorders With Increased Susceptibility to Fungal Infections
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–85
- RecruitingHealthy volunteers
DICER1-related Pleuropulmonary Blastoma Cancer Predisposition Syndrome: A Natural History Study
National Cancer Institute (NCI)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 1 mo–99
- RecruitingHealthy volunteers
Environmental Risk Factors for the Anti-synthetase Syndrome
National Institute of Environmental Health Sciences (NIEHS)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 2–100
- RecruitingHealthy volunteers
Screening Volunteers for Clinical Trials
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
National Eye Institute Biorepository for Retinal Diseases
National Eye Institute (NEI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–120
- RecruitingHealthy volunteers
Oral Bacteria and Immune System Problems Involved in Gum Disease (Periodontitis)
National Institute of Dental and Craniofacial Research (NIDCR)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 7–100
- RecruitingHealthy volunteers
The NIH MINI Study: Metabolism, Infection, and Immunity in Inborn Errors of Metabolism
National Human Genome Research Institute (NHGRI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 1 mo–115
- RecruitingHealthy volunteers
Oral Specimen and Data Acquisition Study of Subjects Requiring Third Molar Removal
National Institute of Dental and Craniofacial Research (NIDCR)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 16–50
- RecruitingHealthy volunteers
Electrical Impedance Myography: Natural History Studies inNeuromuscular Disorders and Healthy Volunteers
National Institute of Neurological Disorders and Stroke (NINDS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–110
- RecruitingHealthy volunteersPhase 2
Hematopoietic Stem Cell Mobilization in Idiopathic CD4 Lymphocytopenia Patients and Healthy Controls for the Study of T Cell Maturation and Trafficking in Murine Models
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Care of the Urothelial Cancer Patient and Prospective Procurement of Urothelial Cancer Tissue
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Clinical and Genetic Evaluation of Individuals With Undiagnosed Disorders Through the Undiagnosed Diseases Network
National Human Genome Research Institute (NHGRI)
- Location
- Birmingham, AL + 23 other US sites
- Eligibility basics
- Ages 1 mo–100
- RecruitingHealthy volunteers
Genetics of Inherited Eye Disease
National Eye Institute (NEI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 1–120
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