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Showing 1–24 of 174 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Intellectual and Developmental Disabilities Clear all
Completed No phase listed Observational

Neonatal Seizure Registry - Developmental Functional EValuation

NCT04337697
View directory record Official record
Conditions
Neonatal Seizure, Hypoxic-Ischemic Encephalopathy, Stroke, Intracranial Hemorrhages, Epilepsy, Cerebral Palsy, Intellectual Disability
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
2 Years to 8 Years
Enrollment
188 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
9
States / cities
San Francisco, California • Stanford, California • Washington D.C., District of Columbia + 5 more
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Phase 1 Interventional

Outcomes In Children With Developmental Delay And Deafness

NCT01256229
View directory record Official record
Conditions
Deafness, Hearing Loss
Interventions
cochlear implantation, hearing aids
Device
Lead sponsor
Stanford University
Other
Eligibility
1 Day to 5 Years
Enrollment
303 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2016
U.S. locations
2
States / cities
Stanford, California • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 14, 2016 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Phase 2 Interventional Results available

A 2-Period Crossover Study of BPN14770 in Adults Males With Fragile X Syndrome

NCT03569631
View directory record Official record
Conditions
Fragile X Syndrome, FXS, Fra(X) Syndrome
Interventions
BPN14770, Placebo
Drug
Lead sponsor
Tetra Discovery Partners
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 18, 2024 · Synced Jun 10, 2026, 8:42 PM EDT
Recruiting No phase listed Observational

MEHMO Natural History and Biomarkers

NCT06019182
View directory record Official record
Conditions
Intellectual Disability, Epilepsy, Hypogonadisms, Microcephaly, Nervous System Malformations, Obesity
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
1 Week to 100 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2053
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Completed No phase listed Observational

DDX3X Syndrome -The Seaver Autism Center for Research and Treatment is Characterizing DDX3X-related Neurodevelopmental Disorders Using Genetic, Medical, and Neuropsychological Measures.

NCT03718910
View directory record Official record
Conditions
DDX3X, Mental Retardation, X-linked 102, Autism Spectrum Disorder
Interventions
Not listed
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
2 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Characterization of WAGR Syndrome and Other Chromosome 11 Gene Deletions

NCT00758108
View directory record Official record
Conditions
WAGR Syndrome, Wilm's Tumor, Aniridia, Urogenital Abnormalities, Mental Retardation
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
2 Years to 99 Years
Enrollment
197 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 11, 2019 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Phase 1 Interventional

Impact of Competency-Based Training and Technical Assistance Employment Outcomes of Individuals With ID/DD

NCT06586827
View directory record Official record
Conditions
Intellectual Disability, Developmental Disability
Interventions
VCU-RRTC Online Course, Zoom Technical Assistance Sessions (6 total)
Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 30, 2025 · Synced Jun 10, 2026, 8:42 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Multiple Gestation Study

NCT02278536
View directory record Official record
Conditions
Trisomy 13, Trisomy 18, Trisomy 21, Sex Chromosome Abnormalities
Interventions
Not listed
Lead sponsor
Natera, Inc.
Industry
Eligibility
18 Years and older
Enrollment
354 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2019
U.S. locations
6
States / cities
San Carlos, California • San Diego, California • New York, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2019 · Synced Jun 10, 2026, 8:42 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Families of Youth with Developmental Disabilities: a Theory-Based Intervention

NCT03495440
View directory record Official record
Conditions
Family Conflict, Marital Conflict, Communication
Interventions
Center Sessions, At-home
Behavioral
Lead sponsor
University of Notre Dame
Other
Eligibility
Not listed
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2024
U.S. locations
2
States / cities
Fort Wayne, Indiana • South Bend, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 14, 2024 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dual Diagnosis Training Trial

NCT06238258
View directory record Official record
Conditions
Training Group
Interventions
SPECTROM Training
Behavioral
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Speech-in-noise Perception in Autism and Fragile X

NCT06088589
View directory record Official record
Conditions
Autism Spectrum Disorder, Fragile X Syndrome
Interventions
Mismatch negativity
Behavioral
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
15 Years to 35 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Completed No phase listed Observational

Molecular Analysis of Microphthalmia/Anophthalmia

NCT00011843
View directory record Official record
Conditions
Anophthalmos
Interventions
Not listed
Lead sponsor
National Human Genome Research Institute (NHGRI)
NIH
Eligibility
Not listed
Enrollment
450 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A PET Brain Imaging Study of mGluR5 in Subjects With Neuropsychiatric Conditions

NCT00870974
View directory record Official record
Conditions
Parkinson Disease, Huntington Disease, Autistic Spectrum Disorders, Fragile X Syndrome, Alzheimer Disease, Mild Cognitive Impairment
Interventions
[18F]FPEB
Drug
Lead sponsor
Institute for Neurodegenerative Disorders
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 5, 2017 · Synced Jun 10, 2026, 8:42 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Alpha Auditory Entrainment for Cognitive Enhancement and Sensory Hypersensitivity in Youth With Developmental Disorders

NCT06227780
View directory record Official record
Conditions
Fragile X Syndrome, Autism Spectrum Disorder, Autistic Disorder, Asperger Syndrome
Interventions
Alpha Auditory Entrainment, Sham
Other
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
5 Years to 10 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Enrolling by invitation No phase listed Observational

Mental Health, Intellectual and Neurodevelopmental Disorder Detection With Artificial Intelligence Models

NCT06792175
View directory record Official record
Conditions
Autism Spectrum Disorder, Depression - Major Depressive Disorder, Anxiety, Generalized, Bipolar Disorder (BD), Attention Deficit Hyperactivity Disorder (ADHD), Schizophrenia Spectrum &Amp; Other Psychotic Disorders, Post Traumatic Stress Disorder, Obsessive Compulsive Disorder (OCD)
Interventions
Solicue Machine Learning Models, Mercuria Machine Learning Models
Diagnostic Test
Lead sponsor
Psyrin Inc.
Industry
Eligibility
13 Years to 60 Years
Enrollment
500 participants
Timeline
2025 – 2026
U.S. locations
2
States / cities
Brookline, Massachusetts • Zanesville, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 2, 2025 · Synced Jun 10, 2026, 8:42 PM EDT
Withdrawn Not applicable Interventional

Vagus Nerve Stimulator for Autism and Other Developmental Disorders

NCT06259201
View directory record Official record
Conditions
Autism Spectrum Disorder, Intellectual Disability, Autonomic Nervous System, Developmental Disability
Interventions
Vagus Nerve Stimulation
Device
Lead sponsor
New York State Institute for Basic Research
Government
Eligibility
12 Years to 40 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
New York, New York • Staten Island, New York
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Not listed Not applicable Interventional

Word Learning in Children With Autism

NCT03419611
View directory record Official record
Conditions
Autistic Disorders Spectrum
Interventions
Multi-Modal, Treatment as Usual, High Intensity Multi-Modal
Behavioral · Other
Lead sponsor
University of Kansas
Other
Eligibility
5 Years to 10 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Lawrence, Kansas
Source: ClinicalTrials.gov public record
Updated Apr 28, 2019 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Not applicable Interventional

Proactive Speech and Language Intervention for Infants With Down Syndrome

NCT06450509
View directory record Official record
Conditions
Down Syndrome
Interventions
Babble Boot Camp
Behavioral
Lead sponsor
Arizona State University
Other
Eligibility
0 Months to 12 Months
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Jun 10, 2026, 8:42 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

SNP-based Microdeletion and Aneuploidy RegisTry (SMART)

NCT02381457
View directory record Official record
Conditions
22q11 Deletion Syndrome, DiGeorge Syndrome, Trisomy 21, Trisomy 18, Trisomy 13, Monosomy X, Sex Chromosome Abnormalities, Cri-du-Chat Syndrome, Angelman Syndrome, Prader-Willi Syndrome, 1p36 Deletion Syndrome
Interventions
Not listed
Lead sponsor
Natera, Inc.
Industry
Eligibility
18 Years to 48 Years · Female only
Enrollment
20,960 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
16
States / cities
San Francisco, California • Camden, New Jersey • Mount Laurel, New Jersey + 10 more
Source: ClinicalTrials.gov public record
Updated Jan 28, 2021 · Synced Jun 10, 2026, 8:42 PM EDT
Recruiting Not applicable Interventional

Using a Smart Inhaler to Support Asthma Management in Adolescents With Intellectual and Developmental Disabilities

NCT06783101
View directory record Official record
Conditions
Asthma in Children, Intellectual Disabilities (F70-F79), Developmental Disability, Autism Spectrum Disorder (ASD)
Interventions
Use of smart inhaler to enhance asthma inhaler proficiency
Behavioral
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
10 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 19, 2025 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Phase 2 Interventional Results available

Treatment of Rett Syndrome With Recombinant Human IGF-1

NCT01777542
View directory record Official record
Conditions
Rett Syndrome
Interventions
Recombinant Human Insulin Growth Factor 1 (rhIGF-1), Placebo
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
2 Years to 10 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 25, 2018 · Synced Jun 10, 2026, 8:42 PM EDT
Completed Phase 1Phase 2 Interventional Results available

RAD001 and Neurocognition in PTEN Hamartoma Tumor Syndrome

NCT02991807
View directory record Official record
Conditions
PTEN Gene Mutation, PTEN Hamartoma Tumor Syndrome
Interventions
RAD001, Placebo
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
5 Years to 45 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
3
States / cities
Palo Alto, California • Boston, Massachusetts • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 16, 2025 · Synced Jun 10, 2026, 8:42 PM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

A Study of RM-718 in Healthy Subjects and Patients With MC4R Pathway Impairment

NCT06239116
View directory record Official record
Conditions
Hypothalamic Obesity, Prader-Willi Syndrome, PWS
Interventions
Part A: RM-718 or placebo (matched to specific RM-718 dose cohort), Part B: RM-718 or placebo (matched to specific RM-718 dose cohort), Part C: RM-718, Part D: RM-718
Drug
Lead sponsor
Rhythm Pharmaceuticals, Inc.
Industry
Eligibility
12 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
7
States / cities
Birmingham, Alabama • Chicago, Illinois • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 21, 2025 · Synced Jun 10, 2026, 8:42 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Defining the Brain Phenotype of Children With Williams Syndrome

NCT01132885
View directory record Official record
Conditions
Williams Syndrome, Duplication
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
5 Years and older
Enrollment
415 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Jun 10, 2026, 8:42 PM EDT