{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=transdermal+estradiol",
    "query": {
      "intervention": "transdermal estradiol"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 100,
    "total_pages": 10,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=transdermal+estradiol&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-10T04:36:42.735Z",
  "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": "NCT00864214",
      "title": "A Pharmacokinetic Evaluation of Bioidentical Compounded Estrogen Cream and Natural Progesterone",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Menopause"
      ],
      "interventions": [
        {
          "name": "bioidentical hormone (Biest)",
          "type": "DRUG"
        },
        {
          "name": "bioidentical hormone (Vivelle-Dot)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "40 Years to 60 Years · Female only"
      },
      "enrollment_count": 40,
      "start_date": "2008-06",
      "completion_date": "2010-04",
      "has_results": false,
      "last_update_posted_date": "2012-01-16",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00864214"
    },
    {
      "nct_id": "NCT00608062",
      "title": "Sex Hormones and Atherosclerosis Prevention in Perimenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Arterial Stiffening",
        "Aging",
        "Menopause"
      ],
      "interventions": [
        {
          "name": "GnRHant - Ganirelix acetate",
          "type": "DRUG"
        },
        {
          "name": "Transdermal estradiol patch",
          "type": "DRUG"
        },
        {
          "name": "Transdermal placebo patch",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 70 Years · Female only"
      },
      "enrollment_count": 155,
      "start_date": "2007-03",
      "completion_date": "2012-10-25",
      "has_results": true,
      "last_update_posted_date": "2020-12-24",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00608062"
    },
    {
      "nct_id": "NCT06686537",
      "title": "Convergent Mechanisms Underlying Reprometabolic Syndrome in Women",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Infertility, Female",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Estradiol Patches",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "38 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 38 Years · Female only"
      },
      "enrollment_count": 20,
      "start_date": "2025-02-25",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-07-21",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 2,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06686537"
    },
    {
      "nct_id": "NCT00167648",
      "title": "Neoadjuvant Estradiol or Androgen Deprivation in Clinically Localized Prostate Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cancer",
        "Prostate Neoplasms"
      ],
      "interventions": [
        {
          "name": "Leuprolide or goserelin",
          "type": "DRUG"
        },
        {
          "name": "Transdermal estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 17,
      "start_date": "2005-03",
      "completion_date": "2006-12",
      "has_results": false,
      "last_update_posted_date": "2009-01-19",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 2,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00167648"
    },
    {
      "nct_id": "NCT03740204",
      "title": "The Role of Estrogen in the Neurobiology of Eating Disorders",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Eating Disorders",
        "Hypoestrogenemia"
      ],
      "interventions": [
        {
          "name": "17-β estradiol transdermal patches with cyclic progesterone",
          "type": "DRUG"
        },
        {
          "name": "Placebo patch and pill",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "14 Years to 35 Years · Female only"
      },
      "enrollment_count": 120,
      "start_date": "2019-06-13",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-05-29",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03740204"
    },
    {
      "nct_id": "NCT01422135",
      "title": "Pharmacokinetic Study of AG200-15 Transdermal Patch to Three Anatomical Sites in Healthy Females",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "AG200-15",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Agile Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 24,
      "start_date": "2011-02",
      "completion_date": "2011-04",
      "has_results": true,
      "last_update_posted_date": "2018-12-31",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 2,
      "location_summary": "Lincoln, Nebraska • Neptune City, New Jersey",
      "locations": [
        {
          "city": "Lincoln",
          "state": "Nebraska"
        },
        {
          "city": "Neptune City",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01422135"
    },
    {
      "nct_id": "NCT01605071",
      "title": "Timing Estrogen After MenoPaUSe",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Insulin Resistance"
      ],
      "interventions": [
        {
          "name": "Estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "70 Years",
        "sex": "FEMALE",
        "summary": "45 Years to 70 Years · Female only"
      },
      "enrollment_count": 53,
      "start_date": "2011-09",
      "completion_date": "2017-01",
      "has_results": true,
      "last_update_posted_date": "2021-03-01",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01605071"
    },
    {
      "nct_id": "NCT00154180",
      "title": "Kronos Early Estrogen Prevention Study (KEEPS)",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Menopause",
        "Arteriosclerosis"
      ],
      "interventions": [
        {
          "name": "Conjugated equine estrogens 0.45 mg/day",
          "type": "DRUG"
        },
        {
          "name": "Transdermal estradiol, 50 mcg/day",
          "type": "DRUG"
        },
        {
          "name": "Micronized progesterone, 200 mg/day x 12 d/month",
          "type": "DRUG"
        },
        {
          "name": "CEE , progesterone, estradiol patch or placebo for each",
          "type": "DRUG"
        },
        {
          "name": "CEE, progesterone, transdermal patch or the placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Kronos Longevity Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "42 Years",
        "maximum_age": "58 Years",
        "sex": "FEMALE",
        "summary": "42 Years to 58 Years · Female only"
      },
      "enrollment_count": 728,
      "start_date": "2005-09",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2009-09-14",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 9,
      "location_summary": "Phoenix, Arizona • San Francisco, California • New Haven, Connecticut + 6 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00154180"
    },
    {
      "nct_id": "NCT01243580",
      "title": "AG200-15 Transdermal Contraceptive Delivery System (TCDS) of Levonorgestrel and Ethinyl Estradiol",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Ortho-Cyclen",
          "type": "DRUG"
        },
        {
          "name": "AG200-15",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Agile Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 36,
      "start_date": "2009-08",
      "completion_date": "2009-12",
      "has_results": true,
      "last_update_posted_date": "2018-01-23",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01243580"
    },
    {
      "nct_id": "NCT00386022",
      "title": "The Effects of Aging and Estrogen on the Pituitary",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "GnRH",
          "type": "DRUG"
        },
        {
          "name": "NAL-GLU GnRH antagonist",
          "type": "DRUG"
        },
        {
          "name": "Estrogen patch",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "80 Years",
        "sex": "FEMALE",
        "summary": "45 Years to 80 Years · Female only"
      },
      "enrollment_count": 19,
      "start_date": "2002-01",
      "completion_date": "2018-01",
      "has_results": true,
      "last_update_posted_date": "2017-04-13",
      "last_synced_at": "2026-09-10T04:36:42.735Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00386022"
    }
  ]
}