Not applicableStudy completedNCT05654974What this trial is testingSexual Habits Affect Penis Size in AdulthoodWho this might be right forObservational Study University Medical Center, Kazakhstan 282
Not applicableStudy completedNCT00249496What this trial is testingEmployment-based Reinforcement to Motivate Drug Abstinence in the Treatment of Drug Addiction. - 1Who this might be right forAlcohol UseDrug UseRisk Behavior+1 more Johns Hopkins University 51
Not applicableStudy completedNCT00601237What this trial is testingEffectiveness of a Cell Phone-Based Program for Abstinence and HIV Risk PreventionWho this might be right forHIV Infections University of Colorado, Denver 103
Not applicableStudy completedNCT02401997What this trial is testingThe Effect of the Sexual Abstinence Period on the Production of Reactive Oxygen Species in Patients Who Planned to Take Part in Intrauterine InseminationWho this might be right forOxidative Stress Gazi University 90
Not applicableStudy completedNCT01303575What this trial is testingInternet-Based Sexual Health Education for Middle School Native American YouthWho this might be right forSexually Transmitted DiseasesPregnancyHIV Infections The University of Texas Health Science Center, Houston 574
Not applicableStudy completedNCT00640653What this trial is testingEfficacy of an Abstinence-Only HIV Risk-Reduction Intervention for Young African-American AdolescentsWho this might be right forHIV InfectionsSexually Transmitted Diseases University of Pennsylvania 662
Not applicableStudy completedNCT04662398What this trial is testingUsing of Testes' Shocker in Improving Sexual ActivityWho this might be right forSexual DysfunctionSexual AbstinenceSexual Desire Disorder+7 more University of Baghdad 77
Not applicableStudy completedNCT01280136What this trial is testingWeb-Based Middle School HIV Prevention Curricula: Aspiring for Reach and ImpactWho this might be right forHIVSexually Transmitted Diseases The University of Texas Health Science Center, Houston 1,700
Early research (Phase 1)Looking for participantsNCT03827460What this trial is testingSex Differences in the Response to Abstinence From Alcohol.Who this might be right forAlcohol Use Disorder Indiana University 160
Testing effectiveness (Phase 2)Study completedNCT00856323What this trial is testingContingency Management for Methamphetamine Abstinence and HIV Post-Exposure Prophylaxis in Men Who Have Sex With MenWho this might be right forAmphetamine-Related DisordersHIVHIV Infections Friends Research Institute, Inc. 53
Not applicableStudy completedNCT02683057What this trial is testingInfluence of Physical Exercise on Semen QualityWho this might be right forSexual Abstinence IVI Bilbao 207
Not applicableStudy completedNCT02667080What this trial is testingSperm Quality in Consecutive Sperm Samples After 4-7 Days and 2 Hours of Sexual AbstinenceWho this might be right forSemen Quality Aalborg University 43
Not applicableStudy completedNCT00167505What this trial is testingAll About Youth: Evaluation of Sexual Risk Avoidance and Risk Reduction Programs for Middle School StudentsWho this might be right forSexually Transmitted DiseasesPregnancyHIV Infections The University of Texas Health Science Center, Houston 1,742
Not applicableUnknownNCT05192252What this trial is testingCorrelation Between Seminal Vesicle Size and Duration of Sexual AbstinenceWho this might be right forSuspected Prostate Cancer Fondation Hôpital Saint-Joseph 250
Post-approval studies (Phase 4)Study completedNCT01975649What this trial is testingEffects of Tribulus Terrestris in Postmenopausal Women With Hypoactive Sexual Desire DisorderWho this might be right forMenopauseSexual Abstinence Federal University of Minas Gerais 44
Not applicableEnded earlyNCT02302859What this trial is testingMobile Media-Rich Interactive Guideline System (MMRIGS) Pilot StudyWho this might be right forTobacco Use Cessation M.D. Anderson Cancer Center 8
Not applicableStudy completedNCT02461940What this trial is testingSTI/HIV Prevention Intervention for Adolescents in SingaporeWho this might be right forSexually Transmitted Infections National University of Singapore 688
Not applicableStudy completedNCT04858919What this trial is testingTransrectal and 3D Transabdominal Ultrasound Compared to Vaginoscopy in Diagnosing Virgins With Genital LesionsWho this might be right forVirginityGenital Diseases, FemaleDiagnoses Disease Ain Shams University 40
Not applicableLooking for participantsNCT07618104What this trial is testingPornography Abstinence and Nocturnal Erections in Adult MenWho this might be right forErection; Incomplete Efforia, Inc 100
Not applicableUnknownNCT04180358What this trial is testingCapacity Builders Inc. Navajo Youth Builders Personal Responsibility Education Innovation Strategies ProjectWho this might be right forSexual AbstinenceResponsible Sex Capacity Builders Inc. 834