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ClinicalTrials.gov public records Last synced Sep 12, 2026, 11:43 PM EDT

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Showing 1–24 of 104 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Sex Characteristics Clear all
Completed Phase 4 Interventional Accepts healthy volunteers

A Study of Semen Characteristics After 9 Months of Daily Tadalafil 20 mg

NCT00382135
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
tadalafil, placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
45 Years and older · Male only
Enrollment
282 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2005
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Oct 24, 2007 · Synced Sep 12, 2026, 11:43 PM EDT
Terminated Not applicable Interventional

Therapeutic Targeting of Sex Differences in Pediatric Brain Tumor Glycolysis

NCT03591861
View directory record Official record
Conditions
Pediatric Brain Tumor
Interventions
Ketogenic diet, BCNU
Procedure · Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
Up to 21 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 11, 2022 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional

Sex Differences in Effectiveness of CBT on IBS Project 3

NCT05155631
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome
Interventions
COGNITIVE BEHAVIORAL THERAPY
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 55 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 15, 2025 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sex Differences in E-cig Perception: Study 1

NCT05432830
View directory record Official record
Conditions
Nicotine Addiction, E-Cig Use, Cigarette Smoking, Sex Differences
Interventions
E-liquid Flavor 1, E-liquid Flavor 2, E-liquid Flavor 3
Other
Lead sponsor
Yale University
Other
Eligibility
21 Years to 44 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Alcohol and Gender Effects on Stress Circuit Function

NCT00226694
View directory record Official record
Conditions
Alcoholism, Stress, Alcohol Dependence
Interventions
Citalopram, Placebo
Drug · Other
Lead sponsor
University of Cincinnati
Other
Eligibility
18 Years to 65 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 6, 2014 · Synced Sep 12, 2026, 11:43 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Sex Differences in Cold-Induced Changes in Maximal Fat Oxidation

NCT07297823
View directory record Official record
Conditions
Exercise
Interventions
Cold temperature, Room Temperature
Other
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 12, 2026, 11:43 PM EDT
Recruiting No phase listed Observational

Gonadal Tissue Freezing for Fertility Preservation in Individuals at Risk for Ovarian Dysfunction, Premature Ovarian Insufficiency and Clinically Indicated Gonadectomy

NCT04948658
View directory record Official record
Conditions
Turner Syndrome, Post-menarcheal Adolescents, Ovarian Disfunction, Galactosemia, Variations in Sex Characteristics, Differences in Sex Development
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
2 Years to 35 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2030
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 12, 2026, 11:43 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Biology of HIV Transmission

NCT00001092
View directory record Official record
Conditions
HIV Infections
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2008
U.S. locations
3
States / cities
Los Angeles, California • San Diego, California • San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 21, 2015 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Phase 2 Interventional Results available

Gender Differences in Response to Nicotine Replacement Therapy and De-Nicotinized Cigarettes

NCT00960778
View directory record Official record
Conditions
Nicotine Dependence
Interventions
nicotine patch (Nicoderm Committed Quitter (CQ), Habitrol), denicotinized cigarettes (Quest 3 cigarettes)
Drug · Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years to 60 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 22, 2018 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Phase 1 Interventional

Raltegravir as Early Therapy in African-Americans Living With HIV Study

NCT00667433
View directory record Official record
Conditions
HIV Infections
Interventions
Raltegravir + Truvada
Drug
Lead sponsor
David A Wohl, MD
Other
Eligibility
18 Years and older
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
2
States / cities
Chapel Hill, North Carolina • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 2, 2017 · Synced Sep 12, 2026, 11:43 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Sex-specific Adaptation to Resistance Training in Older Adults

NCT03440099
View directory record Official record
Conditions
Biological Aging
Interventions
Resistance exercise training
Other
Lead sponsor
University of Massachusetts, Amherst
Other
Eligibility
65 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
Amherst, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 27, 2022 · Synced Sep 12, 2026, 11:43 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Sex Differences in E-Cigarette Perception

NCT07398976
View directory record Official record
Conditions
Nicotine Dependence, E-cigarette Use
Interventions
Nicotine Level 1 (0mg/ml), Nicotine Level 2 (36mg/ml), Nicotine Level 3 (59mg/ml)
Other
Lead sponsor
Yale University
Other
Eligibility
21 Years to 44 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 12, 2026, 11:43 PM EDT
Completed No phase listed Observational

Gender and Neural Substrates of Stress and Craving

NCT00756925
View directory record Official record
Conditions
Cocaine Dependence
Interventions
Acthrel
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 65 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated May 6, 2018 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Sex Differences in Vascular Responses to Exercise

NCT04128215
View directory record Official record
Conditions
Aging
Interventions
Control Period, Exercise Period
Behavioral
Lead sponsor
University of Florida
Other
Eligibility
60 Years to 79 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Nov 13, 2024 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sex-Divergent Effects of Magnesium L-Threonate Supplementation on Sleep Quality, Cognitive Performance, and Neuromuscular Function in Healthy Adults

NCT07706283
View directory record Official record
Conditions
Healthy Adults; Cognitive Performance; Sleep Quality; Neuromuscular Function
Interventions
Magnesium L-threonate, Placebo
Dietary Supplement
Lead sponsor
Barry University
Other
Eligibility
18 Years to 45 Years
Enrollment
81 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Miami Shores, Florida
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional Results available

Prospective Study of Methicillin-Resistant Staphylococcus Aureus (MRSA) Among HIV-Infected Persons

NCT00631566
View directory record Official record
Conditions
HIV Infections, Staphylococcal Infections
Interventions
Mupirocin (Bactroban) 2%; hexachlorophene (pHisoHex) 3%, Placebo
Drug
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
18 Years and older
Enrollment
550 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2017
U.S. locations
4
States / cities
San Diego, California • Bethesda, Maryland • San Antonio, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Sep 12, 2026, 11:43 PM EDT
Completed No phase listed Observational

Gender Differences in Prevalence of Undiagnosed Diabetes in ACS

NCT00589459
View directory record Official record
Conditions
Pre-diabetes, Diabetes
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
30 Years and older
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2008
U.S. locations
2
States / cities
Bridgeport, Connecticut • New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 29, 2023 · Synced Sep 12, 2026, 11:43 PM EDT
Completed No phase listed Observational Results available

Use of a Screening Tool to Describe HIV-Related Cancer Burden and Patient Characteristics in the AMC

NCT05510908
View directory record Official record
Conditions
HIV-Associated Malignant Neoplasm, HIV Infections, Cancer, AIDS Related Lymphoma, AIDS-related Kaposi Sarcoma, AIDS-Related Malignancy, Anal Cancer, HPV-Related Malignancy
Interventions
Non-Interventional, Non-Interventional Follow-up
Other
Lead sponsor
AIDS Malignancy Consortium
Network
Eligibility
18 Years and older
Enrollment
460 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
15
States / cities
La Jolla, California • Washington D.C., District of Columbia • Miami, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 12, 2026, 11:43 PM EDT
Completed No phase listed Observational

Microbiome Insulin Sensitivity Study

NCT03120871
View directory record Official record
Conditions
Obesity, Insulin Resistance, Type2 Diabetes
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
9 Years to 17 Years · Female only
Enrollment
54 participants
Timeline
2017 – 2018
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 9, 2023 · Synced Sep 12, 2026, 11:43 PM EDT
Terminated Phase 2 Interventional

Sex Differences in Neurobehavioral Response to THC

NCT07225777
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
Dronabinol, Placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years to 45 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 7, 2026 · Synced Sep 12, 2026, 11:43 PM EDT
Withdrawn Phase 3 Interventional

Pain Assessment and Quality of Life in Back Pain Patients: Role of Milnacipran

NCT01221740
View directory record Official record
Conditions
Back Pain
Interventions
Savella
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Chestnut Hill, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional Results available

Stress-Reactivity and Cannabis Use in Cannabis-Using Older Adults

NCT05072795
View directory record Official record
Conditions
Cannabis Use
Interventions
Trier Social Stress Task (TSST)
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
50 Years to 80 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 31, 2024 · Synced Sep 12, 2026, 11:43 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Hormones and Reduction in Co-users of Marijuana and Nicotine

NCT02579421
View directory record Official record
Conditions
Marijuana Dependence
Interventions
Progesterone, placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 60 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Sep 12, 2026, 11:43 PM EDT
Not yet recruiting Early Phase 1 Interventional Accepts healthy volunteers

Human Cerebrovascular Blood Flow and Sex Differences in Metabolic Syndrome

NCT07218653
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Indomethacin, Placebo, MRI
Drug · Diagnostic Test
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 45 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2031
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 12, 2026, 11:43 PM EDT