{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=17B-estradiol",
    "query": {
      "intervention": "17B-estradiol"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 9,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-08T03:46:33.137Z",
  "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": "NCT05900895",
      "title": "Estradiol Plus Olaparib for Breast Cancer (PHOEBE)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Metastatic Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Olaparib",
          "type": "DRUG"
        },
        {
          "name": "17b-estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mary D Chamberlin",
      "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": 6,
      "start_date": "2024-07-15",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2025-11-20",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 1,
      "location_summary": "Lebanon, New Hampshire",
      "locations": [
        {
          "city": "Lebanon",
          "state": "New Hampshire"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05900895"
    },
    {
      "nct_id": "NCT00114517",
      "title": "ELITE: Early Versus Late Intervention Trial With Estradiol",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Atherosclerosis"
      ],
      "interventions": [
        {
          "name": "17B-estradiol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Southern California",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 643,
      "start_date": "2004-07",
      "completion_date": "2013-03-05",
      "has_results": true,
      "last_update_posted_date": "2023-01-18",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00114517"
    },
    {
      "nct_id": "NCT04055129",
      "title": "Hormone Induced Effects on Ligament Laxity and Lower Extremity Motor Control",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hormone Influence on Ligament Laxity and Motor Control"
      ],
      "interventions": [
        {
          "name": "No interventions",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of St. Augustine for Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 35 Years · Female only"
      },
      "enrollment_count": 52,
      "start_date": "2021-11-17",
      "completion_date": "2023-08-01",
      "has_results": false,
      "last_update_posted_date": "2023-11-28",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 1,
      "location_summary": "San Marcos, California",
      "locations": [
        {
          "city": "San Marcos",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04055129"
    },
    {
      "nct_id": "NCT00522873",
      "title": "Endometrial Safety Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Postmenopause"
      ],
      "interventions": [
        {
          "name": "0.25mg DRSP / 0.5mg E2 (BAY86-4891)",
          "type": "DRUG"
        },
        {
          "name": "0.5mg NETA / 1.0mg E2 (Activella)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "40 Years to 65 Years · Female only"
      },
      "enrollment_count": 662,
      "start_date": "2007-08",
      "completion_date": "2009-08",
      "has_results": true,
      "last_update_posted_date": "2014-12-31",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 17,
      "location_summary": "Chandler, Arizona • San Diego, California • Denver, Colorado + 13 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Greenwood Village",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00522873"
    },
    {
      "nct_id": "NCT01942668",
      "title": "A Safety and Efficacy Study of the Combination Estradiol and Progesterone to Treat Vasomotor Symptoms",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Menopause"
      ],
      "interventions": [
        {
          "name": "Estradiol",
          "type": "DRUG"
        },
        {
          "name": "Progesterone",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "TherapeuticsMD",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "40 Years to 65 Years · Female only"
      },
      "enrollment_count": 1845,
      "start_date": "2013-08-05",
      "completion_date": "2016-10-28",
      "has_results": true,
      "last_update_posted_date": "2019-05-06",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 119,
      "location_summary": "Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 99 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Montgomery",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01942668"
    },
    {
      "nct_id": "NCT02188745",
      "title": "ER Reactivation Therapy for Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Metastatic Breast Cancer"
      ],
      "interventions": [
        {
          "name": "17B-estradiol",
          "type": "DRUG"
        },
        {
          "name": "Letrozole",
          "type": "DRUG"
        },
        {
          "name": "Anastrozole",
          "type": "DRUG"
        },
        {
          "name": "Exemestane",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Dartmouth-Hitchcock Medical 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": 19,
      "start_date": "2016-03-11",
      "completion_date": "2024-07-05",
      "has_results": false,
      "last_update_posted_date": "2024-07-17",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 3,
      "location_summary": "Springfield, Massachusetts • Rochester, Minnesota • Lebanon, New Hampshire",
      "locations": [
        {
          "city": "Springfield",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Lebanon",
          "state": "New Hampshire"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02188745"
    },
    {
      "nct_id": "NCT00115024",
      "title": "EPAT: Estrogen in the Prevention of Atherosclerosis Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Atherosclerosis",
        "Postmenopause"
      ],
      "interventions": [
        {
          "name": "Micronized 17B-estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute on Aging (NIA)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "46 Years",
        "maximum_age": "80 Years",
        "sex": "FEMALE",
        "summary": "46 Years to 80 Years · Female only"
      },
      "enrollment_count": 222,
      "start_date": "1994-04",
      "completion_date": "1998-11",
      "has_results": false,
      "last_update_posted_date": "2009-12-11",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00115024"
    },
    {
      "nct_id": "NCT00837616",
      "title": "Estrogen Dosing in Turner Syndrome: Pharmacology and Metabolism",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Turner Syndrome",
        "Hypogonadism",
        "Premature Ovarian Failure"
      ],
      "interventions": [
        {
          "name": "17 B estradiol orally",
          "type": "DRUG"
        },
        {
          "name": "17 B estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Nemours Children's Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "20 Years",
        "sex": "FEMALE",
        "summary": "13 Years to 20 Years · Female only"
      },
      "enrollment_count": 41,
      "start_date": "2009-01",
      "completion_date": "2012-12",
      "has_results": true,
      "last_update_posted_date": "2023-05-16",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 2,
      "location_summary": "Jacksonville, Florida • Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00837616"
    },
    {
      "nct_id": "NCT05716516",
      "title": "STUDY02001740;22SCH740: Estradiol For ER+ Advanced Breast Cancer (ESTHER)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Metastatic Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Dartmouth-Hitchcock Medical 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": 36,
      "start_date": "2023-05-04",
      "completion_date": "2027-05",
      "has_results": false,
      "last_update_posted_date": "2026-05-05",
      "last_synced_at": "2026-09-08T03:46:33.137Z",
      "location_count": 1,
      "location_summary": "Lebanon, New Hampshire",
      "locations": [
        {
          "city": "Lebanon",
          "state": "New Hampshire"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05716516"
    }
  ]
}