{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Estrogens&page=12",
    "query": {
      "condition": "Estrogens",
      "page": 12
    },
    "page_size": 10
  },
  "pagination": {
    "page": 12,
    "page_size": 10,
    "total_count": 754,
    "total_pages": 76,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Estrogens&page=13&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Estrogens&page=11&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-29T22:29:29.173Z",
  "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": "NCT07524855",
      "title": "A Study of JNJ-101684362 (HLD-0117) in Patients With Metastatic Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Metastatic Breast Cancer"
      ],
      "interventions": [
        {
          "name": "JNJ-101684362 (HLD-0117)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Janssen Research & Development, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 170,
      "start_date": "2026-04-09",
      "completion_date": "2029-10-10",
      "has_results": false,
      "last_update_posted_date": "2026-09-21",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 6,
      "location_summary": "New Haven, Connecticut • Sarasota, Florida • Boston, Massachusetts + 3 more",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Sarasota",
          "state": "Florida"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07524855"
    },
    {
      "nct_id": "NCT00651976",
      "title": "Letrozole in Treating Postmenopausal Women With Stage I, II or III Breast Cancer That Can Be Removed by Surgery",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "letrozole",
          "type": "DRUG"
        },
        {
          "name": "Blood Collection",
          "type": "OTHER"
        },
        {
          "name": "biopsy/lumpectomy/mastectomy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "Vanderbilt-Ingram Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 213,
      "start_date": "2008-03",
      "completion_date": "2018-09",
      "has_results": false,
      "last_update_posted_date": "2018-10-15",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 5,
      "location_summary": "Atlanta, Georgia • Tulsa, Oklahoma • Pittsburgh, Pennsylvania + 1 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Tulsa",
          "state": "Oklahoma"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00651976"
    },
    {
      "nct_id": "NCT00733408",
      "title": "Nab-Paclitaxel and Bevacizumab Followed By Bevacizumab and Erlotinib in Metastatic Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Estrogen Receptor-negative Breast Cancer",
        "HER2-negative Breast Cancer",
        "Progesterone Receptor-negative Breast Cancer",
        "Recurrent Breast Cancer",
        "Stage IV Breast Cancer",
        "Triple-negative Breast Cancer"
      ],
      "interventions": [
        {
          "name": "paclitaxel albumin-stabilized nanoparticle formulation",
          "type": "DRUG"
        },
        {
          "name": "bevacizumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "erlotinib hydrochloride",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 59,
      "start_date": "2008-04-23",
      "completion_date": "2017-09-28",
      "has_results": true,
      "last_update_posted_date": "2018-12-04",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 17,
      "location_summary": "Anchorage, Alaska • Yuma, Arizona • Lewiston, Idaho + 12 more",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Yuma",
          "state": "Arizona"
        },
        {
          "city": "Lewiston",
          "state": "Idaho"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00733408"
    },
    {
      "nct_id": "NCT00468715",
      "title": "Bicalutamide in Treating Patients With Metastatic Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "bicalutamide",
          "type": "DRUG"
        },
        {
          "name": "diagnostic laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "immunohistochemistry staining method",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 28,
      "start_date": "2007-03-23",
      "completion_date": "2021-06-24",
      "has_results": true,
      "last_update_posted_date": "2022-08-03",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 8,
      "location_summary": "San Francisco, California • Washington D.C., District of Columbia • Boston, Massachusetts + 4 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00468715"
    },
    {
      "nct_id": "NCT04038489",
      "title": "COX Inhibition and Biomarkers During Neoadjuvant Chemoendocrine Therapy for ER+, HER2- Stage I-III Breast Cancer",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer",
        "Estrogen Receptor-positive Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Aspirin",
          "type": "DRUG"
        },
        {
          "name": "Tamoxifen Pill",
          "type": "DRUG"
        },
        {
          "name": "Doxorubicin",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "Paclitaxel",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Virginia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2019-10-18",
      "completion_date": "2023-04-30",
      "has_results": false,
      "last_update_posted_date": "2021-11-22",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 1,
      "location_summary": "Charlottesville, Virginia",
      "locations": [
        {
          "city": "Charlottesville",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04038489"
    },
    {
      "nct_id": "NCT00000897",
      "title": "A Study to Evaluate the Effects of Different Methods of Birth Control on the Drug Actions of Zidovudine (an Anti-HIV Drug) in HIV-Positive Women and to Compare Zidovudine Metabolism in Men and Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Zidovudine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 42,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2011-03-02",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 6,
      "location_summary": "San Francisco, California • Jacksonville, Florida • Albany, New York + 3 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Albany",
          "state": "New York"
        },
        {
          "city": "Buffalo",
          "state": "New York"
        },
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000897"
    },
    {
      "nct_id": "NCT00856050",
      "title": "Letrozole in Women With Advanced Estrogen/Progesterone Receptor Positive Uterine Leiomyosarcoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Leiomyosarcoma"
      ],
      "interventions": [
        {
          "name": "letrozole",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Dana-Farber Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 27,
      "start_date": "2009-02",
      "completion_date": "2014-03",
      "has_results": true,
      "last_update_posted_date": "2017-04-18",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00856050"
    },
    {
      "nct_id": "NCT07391774",
      "title": "Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed by Hormone Therapy With Ribociclib for the Treatment of High Anatomic Stage Breast Cancer With Low Recurrence Risk, The RxFINE-Low Trial",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Anatomic Stage II Breast Cancer AJCC v8",
        "Anatomic Stage IIIA Breast Cancer AJCC v8",
        "Anatomic Stage IIIC Breast Cancer AJCC v8",
        "Estrogen Receptor-Positive Breast Carcinoma",
        "HER2-Negative Breast Carcinoma"
      ],
      "interventions": [
        {
          "name": "Anastrozole",
          "type": "DRUG"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Bone Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Chemotherapy",
          "type": "DRUG"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Exemestane",
          "type": "DRUG"
        },
        {
          "name": "Letrozole",
          "type": "DRUG"
        },
        {
          "name": "Oncotype DX Breast Cancer Assay",
          "type": "PROCEDURE"
        },
        {
          "name": "Positron Emission Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Ribociclib Succinate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1978,
      "start_date": "2026-08-10",
      "completion_date": "2029-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-10-29",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 224,
      "location_summary": "Jonesboro, Arkansas • Auburn, California • Berkeley, California + 185 more",
      "locations": [
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "Auburn",
          "state": "California"
        },
        {
          "city": "Berkeley",
          "state": "California"
        },
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07391774"
    },
    {
      "nct_id": "NCT02057029",
      "title": "Assessment of the Decision-making Impact of the Breast Cancer Index in Recommending Extended Adjuvant Endocrine Therapy for Patients With Early Stage ER-positive Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Cancer",
        "Early Stage Estrogen Receptor (ER) Positive Breast Cancer"
      ],
      "interventions": [
        {
          "name": "BCI Assay Results",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 96,
      "start_date": "2014-01",
      "completion_date": "2015-06",
      "has_results": false,
      "last_update_posted_date": "2016-01-08",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02057029"
    },
    {
      "nct_id": "NCT03281902",
      "title": "Genetic Analysis in Blood and Tumor Samples From Patients With Advanced or Metastatic Estrogen Receptor Positive and HER2 Negative Breast Cancer Receiving Palbociclib and Endocrine Therapy",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Advanced Breast Carcinoma",
        "Locally Advanced Breast Carcinoma",
        "Metastatic Breast Carcinoma",
        "Recurrent Breast Carcinoma",
        "Stage III Breast Cancer AJCC v7",
        "Stage IIIA Breast Cancer AJCC v7",
        "Stage IIIB Breast Cancer AJCC v7",
        "Stage IIIC Breast Cancer AJCC v7",
        "Stage IV Breast Cancer AJCC v6 and v7"
      ],
      "interventions": [
        {
          "name": "Biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 68,
      "start_date": "2017-11-13",
      "completion_date": "2028-03-04",
      "has_results": false,
      "last_update_posted_date": "2026-06-09",
      "last_synced_at": "2026-10-29T22:29:29.173Z",
      "location_count": 3,
      "location_summary": "Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03281902"
    }
  ]
}