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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Seminal Fluid Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Study in Healthy Males to Measure Maraviroc in Blood, Saliva, Seminal Fluid, and Rectal Tissue

NCT00775294
View directory record Official record
Conditions
HIV/AIDS
Interventions
Maraviroc
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 49 Years · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 12, 2011 · Synced Sep 12, 2026, 11:24 AM EDT
Not listed No phase listed Observational

Relationship of the Microenvironment and Male Fertility

NCT04704141
View directory record Official record
Conditions
Male Infertility, Male Hypogonadism
Interventions
Hormone replacement therapy
Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years and older · Male only
Enrollment
150 participants
Timeline
2023 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 19, 2023 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

GSK1349572 Exposure in Blood, Seminal Fluid, and Rectal Fluid and Tissue in Healthy Male Subjects

NCT01459315
View directory record Official record
Conditions
Healthy
Interventions
dolutegravir
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 49 Years · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 3, 2013 · Synced Sep 12, 2026, 11:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study for Future Families

NCT00011687
View directory record Official record
Conditions
Pregnancy
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
18 Years and older
Enrollment
2,400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2003
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 22, 2006 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Study to Evaluate the Concentration of Denosumab in Seminal Fluid in Healthy Men After a Single Subcutaneous Dose

NCT01869686
View directory record Official record
Conditions
Healthy Volunteer
Interventions
Denosumab
Biological
Lead sponsor
Amgen
Industry
Eligibility
40 Years to 65 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Nov 5, 2014 · Synced Sep 12, 2026, 11:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of New Semen Collection & Transportation Kit

NCT04536545
View directory record Official record
Conditions
Sperm Parameters in Fertile and Infertile Men
Interventions
Not listed
Lead sponsor
Turtle Health, Inc.
Industry
Eligibility
Male only
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 5, 2021 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Stork OTC: Collection, Placement & Delivery

NCT02038322
View directory record Official record
Conditions
Safety and Usability
Interventions
The Stork - Conception Aid
Device
Lead sponsor
Rinovum Women's Health, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Monroeville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 15, 2014 · Synced Sep 12, 2026, 11:24 AM EDT
Terminated No phase listed Observational

Presence of Donor-Derived DNA in Semen Samples From Cancer Survivors Who Underwent Donor Stem Cell Transplant

NCT01077440
View directory record Official record
Conditions
Cancer Survivor, Chronic Myeloproliferative Disorders, Leukemia, Lymphoma, Multiple Myeloma and Plasma Cell Neoplasm, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Neoplasms, Neuroblastoma, Testicular Germ Cell Tumor
Interventions
DNA analysis, polymerase chain reaction, flow cytometry, laboratory biomarker analysis
Genetic · Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older · Male only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 9, 2014 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Udenafil on Spermatogenesis

NCT01230541
View directory record Official record
Conditions
Spermatogenesis, Erectile Dysfunction
Interventions
Placebo, Udenafil
Drug
Lead sponsor
Warner Chilcott
Industry
Eligibility
25 Years to 64 Years · Male only
Enrollment
239 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
23
States / cities
Huntsville, Alabama • Anaheim, California • San Diego, California + 19 more
Source: ClinicalTrials.gov public record
Updated Nov 29, 2011 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 2 Interventional Results available

To Evaluate Sperm Parameters in Men With Secondary Hypogonadism Previously Treated With Topical Testosterone

NCT00706719
View directory record Official record
Conditions
Secondary Hypogonadism
Interventions
25 mg Androxal, Testim 1%
Drug
Lead sponsor
Repros Therapeutics Inc.
Industry
Eligibility
21 Years to 60 Years · Male only
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
2
States / cities
New York, New York • Purchase, New York
Source: ClinicalTrials.gov public record
Updated Aug 18, 2015 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Usability Study of the Focus Touch™ Conception System: Semen Collection

NCT01585012
View directory record Official record
Conditions
Infertility
Interventions
Cervical cap (Focus Touch™ Conception System)
Device
Lead sponsor
Rinovum Women's Health, Inc.
Industry
Eligibility
20 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Monroeville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 5, 2015 · Synced Sep 12, 2026, 11:24 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Effects of NLS-133, a Potential Non-Hormonal "On-Demand" Male Contraceptive

NCT07393334
View directory record Official record
Conditions
Male Contraception, Semen Volume, Sperm Motility
Interventions
NLS-133, Placebo, Active Comparator #1
Drug
Lead sponsor
Next Life Sciences
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

The Impact of Prednisone on Semen Parameters and Pregnancy Rates Post Vasectomy Reversal

NCT04788823
View directory record Official record
Conditions
Vasectomy Reversal
Interventions
Prednisone
Drug
Lead sponsor
Charitable Union for the Research and Education of Peyronie's Disease
Other
Eligibility
18 Years to 65 Years · Male only
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Orem, Utah
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Not applicable Interventional

Semen Analysis After Proton Therapy for Prostate Cancer

NCT01072513
View directory record Official record
Conditions
Prostate Cancer
Interventions
Semen analysis
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older · Male only
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 5, 2016 · Synced Sep 12, 2026, 11:24 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Assessing the Effect of Abstinence Period on Semen Parameters

NCT05701163
View directory record Official record
Conditions
Infertility, Male
Interventions
Abstinence followed by semen sample collection.
Other
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
20 Years to 45 Years · Male only
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 26, 2025 · Synced Sep 12, 2026, 11:24 AM EDT
Completed No phase listed Observational

A Study of the Pre- and Post-operative Semen Analyses and Reproductive Hormone Levels of Men Undergoing Weight-reduction Surgery

NCT00596739
View directory record Official record
Conditions
Male Infertility
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 65 Years · Male only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 16, 2016 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prostate Specific Antigen (PSA) and Acute Failure Modes Study of the PATH Woman's Condom and FC2 Female Condom

NCT01178840
View directory record Official record
Conditions
Birth Control
Interventions
WC then FC2, FC2 then WC
Device
Lead sponsor
CONRAD
Other
Eligibility
18 Years and older
Enrollment
505 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 11, 2013 · Synced Sep 12, 2026, 11:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of Discarded Laboratory Pathological Specimens and Media

NCT01219439
View directory record Official record
Conditions
Non-viable Oocytes, Extra Spermatozoa, Seminal Fluid, Granulosa Cells, Serum, Follicular Fluid, Conditioned IVF Media
Interventions
Not listed
Lead sponsor
Reproductive Medicine Associates of New Jersey
Other
Eligibility
18 Years to 65 Years
Enrollment
10,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2022
U.S. locations
1
States / cities
Basking Ridge, New Jersey
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 12, 2026, 11:24 AM EDT
Terminated Phase 3 Interventional Results available

Microsurgical Varicocelectomy Versus No Surgery in Men With a Palpable Varicocele and an Abnormal Semen Analysis

NCT00767338
View directory record Official record
Conditions
Pregnancy, Infertility
Interventions
Timed intercourse, Microsurgical varicocelectomy, Intrauterine insemination
Behavioral · Procedure
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
9
States / cities
Aurora, Colorado • New Haven, Connecticut • Ann Arbor, Michigan + 6 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2013 · Synced Sep 12, 2026, 11:24 AM EDT
Terminated Not applicable Interventional Results available

Effect of Ejaculatory Abstinence on Semen Parameters in Male Factor Infertility Patients

NCT04206800
View directory record Official record
Conditions
Infertility, Male
Interventions
Ejaculatory abstinence less than 24 hours
Diagnostic Test
Lead sponsor
Boston IVF
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Waltham, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 24, 2020 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Pharmacokinetic Study of Avanfil in Healthy Young Male Subjects

NCT00914511
View directory record Official record
Conditions
Avanfil ADME, Semen Exposure, Sperm Function
Interventions
avanafil 200mg
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
18 Years and older · Male only
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 6, 2011 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 4 Interventional

The Effectiveness of Indinavir Plus Zidovudine Plus Lamivudine in HIV-Infected Patients With No Symptoms of Infection

NCT00002179
View directory record Official record
Conditions
HIV Infections
Interventions
Indinavir sulfate, Lamivudine, Zidovudine
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
15
States / cities
Birmingham, Alabama • Los Angeles, California • Redwood City, California + 9 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 12, 2026, 11:24 AM EDT
Completed No phase listed Observational

Changes in Semen or Sperm Caused by Temozolomide in Patients With Newly Diagnosed, Progressive, or Recurrent Primary Malignant Brain Tumors

NCT00499798
View directory record Official record
Conditions
Brain and Central Nervous System Tumors, Chemotherapeutic Agent Toxicity, Infertility
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 60 Years · Male only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2014
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 12, 2026, 11:24 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Study Evaluating the Effects of Avanafil on Semen Parameters

NCT01768676
View directory record Official record
Conditions
Erectile Dysfunction
Interventions
avanafil, Placebo
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
181 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
15
States / cities
Huntsville, Alabama • Los Angeles, California • San Diego, California + 12 more
Source: ClinicalTrials.gov public record
Updated Dec 13, 2015 · Synced Sep 12, 2026, 11:24 AM EDT