Independent directory Public ClinicalTrials.gov records United States
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ClinicalTrials.gov public records Last synced Sep 10, 2026, 3:25 PM EDT

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Showing 1–24 of 75 matching trials from the live ClinicalTrials.gov search.
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Conditions
Fetal Conditions, Maternal; Procedure, Pregnancy Related, Twin to Twin Transfusion Syndrome, In Utero Procedure Affecting Fetus or Newborn, Chorion; Abnormal, Twin Reversal Arterial Perfusion Syndrome, Twin Monochorionic Monoamniotic Placenta, Chorioangioma, Vasa Previa
Interventions
Karl Storz Curved Scope, Karl Storz Straight Scope
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Conditions
Preterm Birth
Interventions
17-alpha-hydroxyprogesterone caproate injectable, Placebo
Drug
Lead sponsor
Obstetrix Medical Group
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
321 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
18
States / cities
Phoenix, Arizona • Tucson, Arizona • Laguna Hills, California + 13 more
Conditions
Obesity, Blood Glucose, High
Interventions
Micronutrient-dense plant-rich Intervention
Behavioral
Lead sponsor
Northern Arizona University
Other
Eligibility
18 Years and older
Enrollment
146 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Flagstaff, Arizona
Completed No phase listed Observational Accepts healthy volunteers

Understanding and Diagnosing Allergic Disease in Twins

NCT01613885
Conditions
Allergies
Interventions
No Intervention
Other
Lead sponsor
Stanford University
Other
Eligibility
0 Years to 80 Years
Enrollment
340 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2019
U.S. locations
2
States / cities
Stanford, California
Withdrawn Phase 2Phase 3 Interventional Accepts healthy volunteers

Vaginal Progesterone in Twins With Short Cervix

NCT01812239
Conditions
Premature Birth
Interventions
Vaginal Progesterone gel., fetal fibronectin swab., Placebo gel
Drug · Procedure
Lead sponsor
Obstetrix Medical Group
Industry
Eligibility
18 Years to 60 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
San Jose, California
Conditions
Twin to Twin Transfusion
Interventions
Fetoscopic Laser Photocoagulation
Procedure
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
216 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
1
States / cities
Houston, Texas
Conditions
Sepsis, Burn Injury, Wound Healing, Critical Illness, Multiple Organ Dysfunction Syndrome
Interventions
Observational Cohort (No Intervention)
Other
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
18 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
3
States / cities
Tampa, Florida • Atlanta, Georgia • Houston, Texas
Conditions
HIV Infections
Interventions
HIV-1 DNA plasmid vaccine, HIV-1 recombinant Ad5 vaccine
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2016
U.S. locations
2
States / cities
Boston, Massachusetts • Seattle, Washington
Conditions
Acquired Immunodeficiency Syndrome, HIV Infection
Interventions
Interleukin-2
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1994 – 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Completed No phase listed Observational Accepts healthy volunteers

The Heart Rhythm Twins Study

NCT05866731
Conditions
Premature Atrial Complex, Premature Ventricular Contraction
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
156 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
San Francisco, California
Conditions
Acquired Immunodeficiency Syndrome, HIV Infection
Interventions
Genetically Marked Syngeneic T Lymphocytes
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1993 – 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Type 2 Diabetes
Interventions
phone application, Standard of Care (SOC)
Device · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
10 Years to 21 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
2
States / cities
Oakland, California • San Francisco, California
Conditions
Twin Twin Transfusion Syndrome
Interventions
Doppler ultrasound of fetal renal artery
Diagnostic Test
Lead sponsor
Columbia University
Other
Eligibility
Female only
Enrollment
24 participants
Timeline
2016 – 2018
U.S. locations
1
States / cities
New York, New York
Conditions
Cannabis
Interventions
Contingency management
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
31 Years to 47 Years
Enrollment
146 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Completed Not applicable Interventional Results available

Prevention of Preterm Birth With a Pessary in Twin Gestations

NCT02056639
Conditions
Premature Birth, Short Cervix
Interventions
Bioteque cup pessary
Device
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
3
States / cities
Philadelphia, Pennsylvania
Conditions
Preterm Delivery, Preterm Birth
Interventions
Fetal Fibronectin, Salivary Estriol
Device
Lead sponsor
Obstetrix Medical Group
Industry
Eligibility
18 Years to 60 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
2
States / cities
Mesa, Arizona • Phoenix, Arizona
Completed No phase listed Observational Results available

Memory and the Hippocampus in Twins

NCT00638885
Conditions
PTSD, Stress Disorders, Post-Traumatic
Interventions
Not listed
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
50 Years to 70 Years · Male only
Enrollment
142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Decatur, Georgia
Conditions
Rheumatoid Arthritis, Systemic Lupus Erythematosus, Idiopathic Inflammatory Myopathies
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
2 Years and older
Enrollment
1,056 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
3
States / cities
Bethesda, Maryland • Research Triangle Park, North Carolina • Madison, Wisconsin
Completed Not applicable Interventional Accepts healthy volunteers

Twins Nutrition Study (TwiNS): Vegan vs. Omnivore

NCT05297825
Conditions
Lipid Metabolism, Glucose Intolerance, Weight Change, Body, Microbiome, Inflammation, Immune Function
Interventions
Vegan diet, Omnivore diet
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Stanford, California
Conditions
Twin Pregnancy, Antepartum Condition or Complication, Preterm Birth, Cervical Dilation Premature
Interventions
Physical exam indicated cerclage
Procedure
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
7
States / cities
Washington D.C., District of Columbia • Albany, New York • New York, New York + 4 more
Conditions
Blood and Blood Disorders, Anemia, Neonatal, Hematologic Disease, Infant, Newborn, Diseases
Interventions
Fetoscopic laser surgery
Procedure
Lead sponsor
Assistance Publique - Hôpitaux de Paris
Other
Eligibility
18 Years and older · Female only
Enrollment
179 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2019
U.S. locations
8
States / cities
Aurora, Colorado • Baltimore, Maryland • Cincinnati, Ohio + 5 more
Completed No phase listed Observational Accepts healthy volunteers

The NICHD Fetal Growth Study: Twin Gestations

NCT01369940
Conditions
Fetal Growth Restriction, Growth Discordancy
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
18 Years to 45 Years · Female only
Enrollment
171 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
9
States / cities
Birmingham, Alabama • Long Beach, California • Orange, California + 6 more
Terminated No phase listed Observational Accepts healthy volunteers

Vaccination Response in Individual Monozygotic Twins

NCT02296359
Conditions
Individuality, Asthma, Immune System and Related Disorders
Interventions
Influenza Vaccination
Biological
Lead sponsor
Michigan State University
Other
Eligibility
18 Years to 80 Years
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
East Lansing, Michigan
Completed No phase listed Observational

Brain Imaging in Children With AD/HD

NCT00008892
Conditions
Attention Deficit Disorder With Hyperactivity, Healthy
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
6 Years to 21 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2007
U.S. locations
1
States / cities
Bethesda, Maryland