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ClinicalTrials.gov public records Last synced May 21, 2026, 8:59 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 520 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Chromosome Abnormality Clear all
Not listed No phase listed Observational
View directory record Official record
Conditions
Down Syndrome, Dysphagia, Oropharyngeal
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
3 Years to 18 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 25, 2024 · Synced May 21, 2026, 8:59 PM EDT
Active, not recruiting Phase 3 Interventional
View directory record Official record
Conditions
Prader-Willi Syndrome
Interventions
tVNS, intermittent stimulation, tVNS, continuous stimulation
Device
Lead sponsor
Foundation for Prader-Willi Research
Other
Eligibility
10 Years to 40 Years
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
18
States / cities
Palo Alto, California • San Diego, California • Aurora, Colorado + 14 more
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced May 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Velocardiofacial Syndrome
Interventions
Challenging Our Minds Program
Behavioral
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
12 Years to 16 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Oct 20, 2016 · Synced May 21, 2026, 8:59 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Gonadal Dysgenesis, Turner's Syndrome
Interventions
cognitive tests and scales
Behavioral
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
Not listed
Enrollment
950 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1990 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced May 21, 2026, 8:59 PM EDT
Suspended Phase 4 Interventional
View directory record Official record
Conditions
Infertility
Interventions
Preimplantation Genetic Diagnosis (PGD)
Procedure
Lead sponsor
Reprogenetics
Industry
Eligibility
37 Years to 42 Years · Female only
Enrollment
1,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
4
States / cities
Beverly Hills, California • Highland Park, Illinois • Livingston, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 22, 2010 · Synced May 21, 2026, 8:59 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
Sertraline, Placebo
Drug
Lead sponsor
Randi J. Hagerman, MD
Other
Eligibility
24 Months to 68 Months
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Sep 24, 2017 · Synced May 21, 2026, 8:59 PM EDT
Completed Phase 3 Interventional
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
BPN14770/ zatolmilast, Placebo
Drug
Lead sponsor
Tetra Discovery Partners
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
171 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
17
States / cities
Irvine, California • Orange, California • Sacramento, California + 14 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2025 · Synced May 21, 2026, 8:59 PM EDT
Completed Phase 3 Interventional
View directory record Official record
Conditions
Prader-Willi Syndrome
Interventions
DCCR, Placebo for DCCR
Drug
Lead sponsor
Soleno Therapeutics, Inc.
Industry
Eligibility
4 Years and older
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
20
States / cities
Orange, California • Palo Alto, California • San Diego, California + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 18, 2024 · Synced May 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Down Syndrome
Interventions
Spatial Ability Experience
Behavioral
Lead sponsor
University of Alabama, Tuscaloosa
Other
Eligibility
4 Years to 25 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Tuscaloosa, Alabama
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced May 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Aneuploidy, Pregnancy Complications
Interventions
iPad-based decision aid, Genetic counseling appointment
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
197 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 21, 2020 · Synced May 21, 2026, 8:59 PM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
AFQ056, Placebo
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 45 Years
Enrollment
175 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
12
States / cities
Phoenix, Arizona • Sacramento, California • Decatur, Georgia + 9 more
Source: ClinicalTrials.gov public record
Updated Dec 22, 2020 · Synced May 21, 2026, 8:59 PM EDT
Terminated Phase 3 Interventional
View directory record Official record
Conditions
Prader-willi Syndrome
Interventions
rimonabant, placebo
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 35 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 19, 2023 · Synced May 21, 2026, 8:59 PM EDT
Terminated No phase listed Observational
View directory record Official record
Conditions
Cornelia de Lange Syndrome
Interventions
Autonomic Dysfunction Testing
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
8 Years to 18 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 5, 2018 · Synced May 21, 2026, 8:59 PM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Down Syndrome, Autonomic Dysfunction
Interventions
Fear Response, Cold Stress, Pain Response, Caffeine, 12-Hour Fast, Maximal Dynamic Exercise
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 50 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced May 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Down Syndrome, Obstructive Sleep Apnea
Interventions
Open-ended semi-structured interviews
Behavioral
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
6 Years to 17 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced May 21, 2026, 8:59 PM EDT
Enrolling by invitation Phase 3 Interventional
View directory record Official record
Conditions
Angelman Syndrome
Interventions
GTX-102
Drug
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
Not listed
Enrollment
255 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
6
States / cities
Los Angeles, California • San Diego, California • Atlanta, Georgia + 3 more
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced May 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Down Syndrome
Interventions
Treadmill Training, Supramalleolar Orthoses
Behavioral · Device
Lead sponsor
University of Michigan
Other
Eligibility
6 Months to 36 Months
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 3, 2017 · Synced May 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Language Development Disorders, Down Syndrome, Child Language
Interventions
Semantic cues (perform action), syntactic cues (sentence frame), or combined semantic and syntactic cues
Behavioral
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
3 Years to 17 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 6, 2024 · Synced May 21, 2026, 8:59 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Obstructive Sleep Apnea of Child
Interventions
Adenotonsillectomy, Drug-induced sleep endoscopy directed surgery
Procedure
Lead sponsor
Oregon Health and Science University
Other
Eligibility
2 Years to 18 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 28, 2025 · Synced May 21, 2026, 8:59 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Sleep Disorders
Interventions
Circadin 2/5/10 mg, Placebo
Drug
Lead sponsor
Neurim Pharmaceuticals Ltd.
Industry
Eligibility
2 Years to 17 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
18
States / cities
Phoenix, Arizona • Miami Lakes, Florida • Orange City, Florida + 14 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2024 · Synced May 21, 2026, 8:59 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Turner Syndrome
Interventions
ANS training
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
6 Years to 40 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated May 8, 2022 · Synced May 21, 2026, 8:59 PM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Down Syndrome
Interventions
Body weight supported harness
Behavioral
Lead sponsor
Boston University Charles River Campus
Other
Eligibility
Up to 2 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 13, 2025 · Synced May 21, 2026, 8:59 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available
View directory record Official record
Conditions
Down Syndrome, Trisomy 21
Interventions
Not listed
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
10 Years to 20 Years
Enrollment
257 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 30, 2019 · Synced May 21, 2026, 8:59 PM EDT
Withdrawn No phase listed Observational
View directory record Official record
Conditions
Klinefelter Syndrome
Interventions
Not listed
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
2 Years to 21 Years · Male only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced May 21, 2026, 8:59 PM EDT