{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Progesterone+Levels",
    "query": {
      "condition": "Progesterone Levels"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 7,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-23T09:47:57.641Z",
  "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": "NCT00005923",
      "title": "The Effect of Estrogen and Progesterone Levels on Knee and Ankle Joint Laxity",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Center for Research Resources (NCRR)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": "23 Years",
        "sex": "ALL",
        "summary": "15 Years to 23 Years"
      },
      "enrollment_count": null,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2005-06-24",
      "last_synced_at": "2026-07-23T09:47:57.641Z",
      "location_count": 1,
      "location_summary": "Burlington, Vermont",
      "locations": [
        {
          "city": "Burlington",
          "state": "Vermont"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00005923"
    },
    {
      "nct_id": "NCT04783857",
      "title": "Modifying Progesterone and Estradiol Levels to Prevent Postpartum Cigarette Smoking Relapse and Reduce Secondhand Smoke Exposure in Infants and Children",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Smoking",
        "Smoking Cessation",
        "Smoking Reduction"
      ],
      "interventions": [
        {
          "name": "Progesterone 200 MG Oral Capsule",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 171,
      "start_date": "2022-04-14",
      "completion_date": "2027-06-02",
      "has_results": false,
      "last_update_posted_date": "2026-07-13",
      "last_synced_at": "2026-07-23T09:47:57.641Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04783857"
    },
    {
      "nct_id": "NCT00699595",
      "title": "Hormonal Effects on Pain Perception",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pregnancy",
        "Progesterone Levels",
        "Pregnancy Associated Analgesia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "19 Years to 45 Years · Female only"
      },
      "enrollment_count": 50,
      "start_date": "2008-09",
      "completion_date": "2014-11",
      "has_results": false,
      "last_update_posted_date": "2014-11-11",
      "last_synced_at": "2026-07-23T09:47:57.641Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00699595"
    },
    {
      "nct_id": "NCT01513954",
      "title": "Examination of Serum Progesterone Levels in an IVF Population Following Two Types of Egg Aspiration",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Infertility, Female"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Red Rock Fertility Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "37 Years",
        "sex": "FEMALE",
        "summary": "21 Years to 37 Years · Female only"
      },
      "enrollment_count": 450,
      "start_date": "2012-01",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2012-01-20",
      "last_synced_at": "2026-07-23T09:47:57.641Z",
      "location_count": 1,
      "location_summary": "Las Vegas, Nevada",
      "locations": [
        {
          "city": "Las Vegas",
          "state": "Nevada"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01513954"
    },
    {
      "nct_id": "NCT00572351",
      "title": "The Effects of Red Wine and White Wine on Blood Estrogen and Progesterone Levels",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Red Wine",
          "type": "OTHER"
        },
        {
          "name": "White Wine",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Cedars-Sinai Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "21 Years and older · Female only"
      },
      "enrollment_count": 44,
      "start_date": "2006-01",
      "completion_date": "2007-03",
      "has_results": false,
      "last_update_posted_date": "2019-04-23",
      "last_synced_at": "2026-07-23T09:47:57.641Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00572351"
    },
    {
      "nct_id": "NCT00041899",
      "title": "Comparison of Blood Levels of Two Formulations of the Selective Hormone Receptor Modulator CDB-2914",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "CDB-2914",
          "type": "DRUG"
        },
        {
          "name": "COB-2914",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 15,
      "start_date": "2002-05",
      "completion_date": "2005-03",
      "has_results": false,
      "last_update_posted_date": "2008-03-04",
      "last_synced_at": "2026-07-23T09:47:57.641Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00041899"
    },
    {
      "nct_id": "NCT00026962",
      "title": "Effects of Raloxifene on Hormone Levels",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "measuring estradiol and progesterone levels in saliva",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 60,
      "start_date": "1999-09",
      "completion_date": "2003-08",
      "has_results": false,
      "last_update_posted_date": "2008-03-04",
      "last_synced_at": "2026-07-23T09:47:57.641Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00026962"
    }
  ]
}