{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Sex+Characteristics",
    "query": {
      "condition": "Sex Characteristics"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 104,
    "total_pages": 11,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Sex+Characteristics&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-13T07:17:13.483Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT00382135",
      "title": "A Study of Semen Characteristics After 9 Months of Daily Tadalafil 20 mg",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Erectile Dysfunction"
      ],
      "interventions": [
        {
          "name": "tadalafil",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "45 Years and older · Male only"
      },
      "enrollment_count": 282,
      "start_date": "2003-11",
      "completion_date": "2005-12",
      "has_results": false,
      "last_update_posted_date": "2007-10-25",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "Bothell, Washington",
      "locations": [
        {
          "city": "Bothell",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00382135"
    },
    {
      "nct_id": "NCT03591861",
      "title": "Therapeutic Targeting of Sex Differences in Pediatric Brain Tumor Glycolysis",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pediatric Brain Tumor"
      ],
      "interventions": [
        {
          "name": "Ketogenic diet",
          "type": "PROCEDURE"
        },
        {
          "name": "BCNU",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "Up to 21 Years"
      },
      "enrollment_count": 2,
      "start_date": "2019-05-01",
      "completion_date": "2022-11-01",
      "has_results": false,
      "last_update_posted_date": "2022-12-12",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03591861"
    },
    {
      "nct_id": "NCT05155631",
      "title": "Sex Differences in Effectiveness of CBT on IBS Project 3",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "IBS - Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "COGNITIVE BEHAVIORAL THERAPY",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 92,
      "start_date": "2021-12-18",
      "completion_date": "2025-01-01",
      "has_results": false,
      "last_update_posted_date": "2025-04-16",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05155631"
    },
    {
      "nct_id": "NCT05432830",
      "title": "Sex Differences in E-cig Perception: Study 1",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Nicotine Addiction",
        "E-Cig Use",
        "Cigarette Smoking",
        "Sex Differences"
      ],
      "interventions": [
        {
          "name": "E-liquid Flavor 1",
          "type": "OTHER"
        },
        {
          "name": "E-liquid Flavor 2",
          "type": "OTHER"
        },
        {
          "name": "E-liquid Flavor 3",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "44 Years",
        "sex": "ALL",
        "summary": "21 Years to 44 Years"
      },
      "enrollment_count": 66,
      "start_date": "2024-04-30",
      "completion_date": "2025-07-18",
      "has_results": false,
      "last_update_posted_date": "2026-01-28",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05432830"
    },
    {
      "nct_id": "NCT00226694",
      "title": "Alcohol and Gender Effects on Stress Circuit Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Alcoholism",
        "Stress",
        "Alcohol Dependence"
      ],
      "interventions": [
        {
          "name": "Citalopram",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Cincinnati",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 96,
      "start_date": "2003-09",
      "completion_date": "2012-08",
      "has_results": false,
      "last_update_posted_date": "2014-01-07",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "Cincinnati, Ohio",
      "locations": [
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00226694"
    },
    {
      "nct_id": "NCT07297823",
      "title": "Sex Differences in Cold-Induced Changes in Maximal Fat Oxidation",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Exercise"
      ],
      "interventions": [
        {
          "name": "Cold temperature",
          "type": "OTHER"
        },
        {
          "name": "Room Temperature",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Colorado State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 20,
      "start_date": "2026-04-15",
      "completion_date": "2027-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-15",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "Fort Collins, Colorado",
      "locations": [
        {
          "city": "Fort Collins",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07297823"
    },
    {
      "nct_id": "NCT04948658",
      "title": "Gonadal Tissue Freezing for Fertility Preservation in Individuals at Risk for Ovarian Dysfunction, Premature Ovarian Insufficiency and Clinically Indicated Gonadectomy",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Turner Syndrome",
        "Post-menarcheal Adolescents",
        "Ovarian Disfunction",
        "Galactosemia",
        "Variations in Sex Characteristics",
        "Differences in Sex Development"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "2 Years to 35 Years"
      },
      "enrollment_count": 200,
      "start_date": "2021-09-13",
      "completion_date": "2030-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-14",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04948658"
    },
    {
      "nct_id": "NCT00001092",
      "title": "The Biology of HIV Transmission",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "1999-10",
      "completion_date": "2008-10",
      "has_results": false,
      "last_update_posted_date": "2015-10-22",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 3,
      "location_summary": "Los Angeles, California • San Diego, California • San Francisco, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00001092"
    },
    {
      "nct_id": "NCT00960778",
      "title": "Gender Differences in Response to Nicotine Replacement Therapy and De-Nicotinized Cigarettes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Nicotine Dependence"
      ],
      "interventions": [
        {
          "name": "nicotine patch (Nicoderm Committed Quitter (CQ), Habitrol)",
          "type": "DRUG"
        },
        {
          "name": "denicotinized cigarettes (Quest 3 cigarettes)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Medical University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "21 Years to 60 Years"
      },
      "enrollment_count": 33,
      "start_date": "2009-03",
      "completion_date": "2012-06",
      "has_results": true,
      "last_update_posted_date": "2018-10-23",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 1,
      "location_summary": "Charleston, South Carolina",
      "locations": [
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00960778"
    },
    {
      "nct_id": "NCT00667433",
      "title": "Raltegravir as Early Therapy in African-Americans Living With HIV Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Raltegravir + Truvada",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "David A Wohl, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 38,
      "start_date": "2008-06",
      "completion_date": "2011-12",
      "has_results": false,
      "last_update_posted_date": "2017-03-03",
      "last_synced_at": "2026-09-13T07:17:13.483Z",
      "location_count": 2,
      "location_summary": "Chapel Hill, North Carolina • Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        },
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00667433"
    }
  ]
}