{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Estradiol+vaginal+ring",
    "query": {
      "intervention": "Estradiol vaginal ring"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 61,
    "total_pages": 7,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Estradiol+vaginal+ring&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-23T01:28:58.196Z",
  "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": "NCT04257500",
      "title": "Does Vaginal Delivery of Combined Hormonal Contraception Affect the Risk of Metabolic Syndrome in Overweight/Obese Women With PCOS",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Polycystic Ovary Syndrome"
      ],
      "interventions": [
        {
          "name": "Etonogestrel/ethinyl estradiol vaginal ring",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Andrea Roe, MD, MPH",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 40 Years · Female only"
      },
      "enrollment_count": 22,
      "start_date": "2020-09-03",
      "completion_date": "2025-08-22",
      "has_results": false,
      "last_update_posted_date": "2025-12-17",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04257500"
    },
    {
      "nct_id": "NCT01903031",
      "title": "Evaluating Pharmacokinetic Interactions With Vaginal Ring Contraceptives and ART",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "HIV-1 Infection"
      ],
      "interventions": [
        {
          "name": "Nuvaring",
          "type": "DEVICE"
        },
        {
          "name": "EFV",
          "type": "DRUG"
        },
        {
          "name": "ATV/r",
          "type": "DRUG"
        },
        {
          "name": "TDF",
          "type": "DRUG"
        },
        {
          "name": "NRTIs",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DRUG"
      ],
      "sponsor": "Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "16 Years and older · Female only"
      },
      "enrollment_count": 84,
      "start_date": "2014-12-30",
      "completion_date": "2016-10-10",
      "has_results": true,
      "last_update_posted_date": "2018-06-06",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 10,
      "location_summary": "Birmingham, Alabama • Los Angeles, California • Aurora, Colorado + 6 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01903031"
    },
    {
      "nct_id": "NCT01923298",
      "title": "Estradiol Levels in Patients Treated With Estring",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Estrogen Levels Among Breast Cancer Patients"
      ],
      "interventions": [
        {
          "name": "Estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Arizona",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 14,
      "start_date": "2013-08-09",
      "completion_date": "2019-04-24",
      "has_results": true,
      "last_update_posted_date": "2022-02-10",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 1,
      "location_summary": "Tucson, Arizona",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01923298"
    },
    {
      "nct_id": "NCT02224313",
      "title": "Effect of Oral Estradiol and Progesterone Therapy on Vaginal Cytokines in Postmenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Menopause"
      ],
      "interventions": [
        {
          "name": "oral estradiol 1.0 mg",
          "type": "DRUG"
        },
        {
          "name": "oral progesterone 100 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Intira Sriprasert",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "20 Years to 65 Years · Female only"
      },
      "enrollment_count": 20,
      "start_date": "2015-12",
      "completion_date": "2018-08",
      "has_results": true,
      "last_update_posted_date": "2020-03-19",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02224313"
    },
    {
      "nct_id": "NCT00999479",
      "title": "Post Operative Continuous Active Combination Sex Steroids for the Prevention of Recurrent Endometrioma Formation",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Endometrioma"
      ],
      "interventions": [
        {
          "name": "Norethindrone acetate and ethinyl estradiol tablets, USP",
          "type": "DRUG"
        },
        {
          "name": "ferrous fumarate (placebo) tablets",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Oklahoma",
      "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": 0,
      "start_date": "2009-10",
      "completion_date": "2011-10",
      "has_results": false,
      "last_update_posted_date": "2013-12-10",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 1,
      "location_summary": "Oklahoma City, Oklahoma",
      "locations": [
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00999479"
    },
    {
      "nct_id": "NCT02668796",
      "title": "To Study Generic Estradiol 10 mcg Vaginal Tablets in the Treatment of Vulvar and Vaginal Atrophy in Post Menopausal Women.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Vulvar and Vaginal Atrophy"
      ],
      "interventions": [
        {
          "name": "Estradiol Vaginal Tablets 10 mcg (Glenmark)",
          "type": "DRUG"
        },
        {
          "name": "Vagifem® (Estradiol Vaginal Tablets) 10 mcg (Novo Nordisk)",
          "type": "DRUG"
        },
        {
          "name": "Placebo of Estradiol Vaginal Tablets 10 mcg (Glenmark)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Glenmark Pharmaceuticals Ltd. India",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "30 Years to 75 Years · Female only"
      },
      "enrollment_count": 522,
      "start_date": "2016-01",
      "completion_date": "2016-09-21",
      "has_results": false,
      "last_update_posted_date": "2017-11-14",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 1,
      "location_summary": "Mahwah, New Jersey",
      "locations": [
        {
          "city": "Mahwah",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02668796"
    },
    {
      "nct_id": "NCT01546454",
      "title": "Relationship Between the Menstrual Cycle and Heart Disease in Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Coronary Heart Disease"
      ],
      "interventions": [
        {
          "name": "Ethinyl Estradiol-Levonorgestrel combination",
          "type": "DRUG"
        },
        {
          "name": "leuprolide acetate",
          "type": "DRUG"
        },
        {
          "name": "Estradiol",
          "type": "DRUG"
        },
        {
          "name": "Progesterone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "21 Years to 40 Years · Female only"
      },
      "enrollment_count": 5,
      "start_date": "2012-02",
      "completion_date": "2013-01",
      "has_results": true,
      "last_update_posted_date": "2017-03-22",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01546454"
    },
    {
      "nct_id": "NCT01958073",
      "title": "Vaginal Estrogen for the Prevention of Recurrent Urinary Tract Infection in Postmenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Recurrent Urinary Tract Infection"
      ],
      "interventions": [
        {
          "name": "Conjugated Estrogen Vaginal Cream",
          "type": "DRUG"
        },
        {
          "name": "Estradiol Ring",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 100 Years · Female only"
      },
      "enrollment_count": 35,
      "start_date": "2013-10",
      "completion_date": "2017-12",
      "has_results": true,
      "last_update_posted_date": "2020-09-21",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 2,
      "location_summary": "La Jolla, California • New York, New York",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01958073"
    },
    {
      "nct_id": "NCT01779947",
      "title": "Study to Evaluate the Safety and Bioequivalence of Estradiol Vaginal Inserts, 10 mcg and Vagifem® 10 mcg and Compare to Placebo",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Atrophic Vaginitis Due to Menopause"
      ],
      "interventions": [
        {
          "name": "Estradiol Vaginal Tablets 10 mcg",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amneal Pharmaceuticals, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "30 Years to 75 Years · Female only"
      },
      "enrollment_count": 519,
      "start_date": "2012-03",
      "completion_date": "2012-12",
      "has_results": false,
      "last_update_posted_date": "2014-06-26",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 25,
      "location_summary": "Huntsville, Alabama • Montgomery, Alabama • San Diego, California + 19 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01779947"
    },
    {
      "nct_id": "NCT01813162",
      "title": "In Vivo Drug Interaction Pharmacokinetic Study of Tenofovir 1% Gel and Three Commonly Used Vaginal Products",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "HIV Prevention"
      ],
      "interventions": [
        {
          "name": "Tenofovir 1% gel",
          "type": "DRUG"
        },
        {
          "name": "Vaginal product",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "CONRAD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 101,
      "start_date": "2013-12",
      "completion_date": "2014-12",
      "has_results": false,
      "last_update_posted_date": "2015-05-22",
      "last_synced_at": "2026-09-23T01:28:58.196Z",
      "location_count": 2,
      "location_summary": "San Francisco, California • The Bronx, New York",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01813162"
    }
  ]
}