{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Spermatogenesis",
    "query": {
      "condition": "Spermatogenesis"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 20,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Spermatogenesis&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-23T14:07:33.428Z",
  "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": "NCT03206450",
      "title": "Biospecimen Analysis in Determining Effects of Chemotherapy on Fertility in Osteosarcoma Survivors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Osteosarcoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "Children's Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "MALE",
        "summary": "18 Years to 50 Years · Male only"
      },
      "enrollment_count": 224,
      "start_date": "2017-12-06",
      "completion_date": "2024-06-30",
      "has_results": false,
      "last_update_posted_date": "2024-08-26",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 93,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 76 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Downey",
          "state": "California"
        },
        {
          "city": "Duarte",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03206450"
    },
    {
      "nct_id": "NCT01155518",
      "title": "Hypogonadism in Young Men With Type 2 Diabetes",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypogonadotropic Hypogonadism",
        "Type 2 Diabetes"
      ],
      "interventions": [
        {
          "name": "testosterone",
          "type": "DRUG"
        },
        {
          "name": "clomiphene",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "State University of New York at Buffalo",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "MALE",
        "summary": "18 Years to 40 Years · Male only"
      },
      "enrollment_count": 5,
      "start_date": "2010-06",
      "completion_date": "2013-12",
      "has_results": true,
      "last_update_posted_date": "2019-10-04",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 1,
      "location_summary": "Buffalo, New York",
      "locations": [
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01155518"
    },
    {
      "nct_id": "NCT00156650",
      "title": "Manipulation of the Intratesticular Hormonal Milieu With Exogenous Testosterone (HOP 5) Testicular Aspiration Addendum",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Contraception"
      ],
      "interventions": [
        {
          "name": "Acyline",
          "type": "DRUG"
        },
        {
          "name": "Testosterone Gel",
          "type": "DRUG"
        },
        {
          "name": "Depo-Medroxyprogesterone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "MALE",
        "summary": "18 Years to 55 Years · Male only"
      },
      "enrollment_count": 23,
      "start_date": "2004-12",
      "completion_date": "2005-07",
      "has_results": false,
      "last_update_posted_date": "2008-09-19",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00156650"
    },
    {
      "nct_id": "NCT02147964",
      "title": "ITT-5 Mechanisms of Spermatogenesis in Man",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Gonadotropin Deficiency"
      ],
      "interventions": [
        {
          "name": "Testosterone 1% Gel",
          "type": "DRUG"
        },
        {
          "name": "Acyline",
          "type": "DRUG"
        },
        {
          "name": "Dutasteride",
          "type": "DRUG"
        },
        {
          "name": "Ketoconazole",
          "type": "DRUG"
        },
        {
          "name": "HCG",
          "type": "DRUG"
        },
        {
          "name": "placebo dutasteride",
          "type": "DRUG"
        },
        {
          "name": "placebo ketoconazole",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "MALE",
        "summary": "18 Years to 55 Years · Male only"
      },
      "enrollment_count": 0,
      "start_date": "2019-06",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2019-12-18",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02147964"
    },
    {
      "nct_id": "NCT05381831",
      "title": "Natesto Spermatogenesis Reboot",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypogonadism, Male"
      ],
      "interventions": [
        {
          "name": "NatestoTM",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "MALE",
        "summary": "18 Years to 64 Years · Male only"
      },
      "enrollment_count": 13,
      "start_date": "2022-06-01",
      "completion_date": "2025-04-21",
      "has_results": false,
      "last_update_posted_date": "2025-06-13",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05381831"
    },
    {
      "nct_id": "NCT02461303",
      "title": "Fertility Assessment in Patients With Klinefelter Syndrome",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Klinefelter Syndrome"
      ],
      "interventions": [
        {
          "name": "Counseling",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pittsburgh",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "25 Years",
        "sex": "MALE",
        "summary": "12 Years to 25 Years · Male only"
      },
      "enrollment_count": 6,
      "start_date": "2016-01-07",
      "completion_date": "2017-12-12",
      "has_results": false,
      "last_update_posted_date": "2018-07-24",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 2,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02461303"
    },
    {
      "nct_id": "NCT01768676",
      "title": "Study Evaluating the Effects of Avanafil on Semen Parameters",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Erectile Dysfunction"
      ],
      "interventions": [
        {
          "name": "avanafil",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "VIVUS LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "MALE",
        "summary": "18 Years to 45 Years · Male only"
      },
      "enrollment_count": 181,
      "start_date": "2012-12",
      "completion_date": "2014-08",
      "has_results": true,
      "last_update_posted_date": "2015-12-14",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 15,
      "location_summary": "Huntsville, Alabama • Los Angeles, California • San Diego, California + 12 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Parker",
          "state": "Colorado"
        },
        {
          "city": "Aventura",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01768676"
    },
    {
      "nct_id": "NCT00194649",
      "title": "Glycosphingolipid Inhibition and Spermatogenesis in Man: A Pilot Study (MIG 2)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Contraception"
      ],
      "interventions": [
        {
          "name": "Miglustat (Zavesca)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "MALE",
        "summary": "18 Years to 50 Years · Male only"
      },
      "enrollment_count": 8,
      "start_date": "2005-06",
      "completion_date": "2006-01",
      "has_results": false,
      "last_update_posted_date": "2008-09-19",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00194649"
    },
    {
      "nct_id": "NCT00229593",
      "title": "NES Gel-1, To Evaluate Nestorone Gel in Combination With Testosterone Gel",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Contraception"
      ],
      "interventions": [
        {
          "name": "Nestorone gel",
          "type": "DRUG"
        },
        {
          "name": "Testosterone Gel",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "MALE",
        "summary": "18 Years to 50 Years · Male only"
      },
      "enrollment_count": 140,
      "start_date": "2005-09",
      "completion_date": "2007-01",
      "has_results": false,
      "last_update_posted_date": "2014-12-04",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 2,
      "location_summary": "Torrance, California • Seattle, Washington",
      "locations": [
        {
          "city": "Torrance",
          "state": "California"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00229593"
    },
    {
      "nct_id": "NCT02118714",
      "title": "Atrasentan Spermatogenesis and Testicular Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Nephropathy",
        "Diabetes"
      ],
      "interventions": [
        {
          "name": "Atrasentan",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AbbVie",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "75 Years",
        "sex": "MALE",
        "summary": "30 Years to 75 Years · Male only"
      },
      "enrollment_count": 20,
      "start_date": "2015-04-06",
      "completion_date": "2018-07-16",
      "has_results": true,
      "last_update_posted_date": "2019-05-07",
      "last_synced_at": "2026-07-23T14:07:33.428Z",
      "location_count": 9,
      "location_summary": "Laguna Hills, California • Santa Monica, California • Evergreen Park, Illinois + 6 more",
      "locations": [
        {
          "city": "Laguna Hills",
          "state": "California"
        },
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Evergreen Park",
          "state": "Illinois"
        },
        {
          "city": "Springfield",
          "state": "Illinois"
        },
        {
          "city": "Metairie",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02118714"
    }
  ]
}