{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Progesterone+Only+Hormone+Replacement+Therapy",
    "query": {
      "intervention": "Progesterone Only Hormone Replacement Therapy"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 11,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Progesterone+Only+Hormone+Replacement+Therapy&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-24T06:00:26.066Z",
  "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": "NCT00565916",
      "title": "Evaluating the Roles of Estrogen and Progesterone in Heart Metabolism",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postmenopausal Syndrome"
      ],
      "interventions": [
        {
          "name": "Estrogen",
          "type": "DRUG"
        },
        {
          "name": "Progesterone",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "55 Years to 75 Years · Female only"
      },
      "enrollment_count": 22,
      "start_date": "2004-08",
      "completion_date": "2008-01",
      "has_results": true,
      "last_update_posted_date": "2018-10-16",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00565916"
    },
    {
      "nct_id": "NCT01216358",
      "title": "Boston Migraine and Contraception Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Headache"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Planned Parenthood League of Massachusetts",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 65 Years · Female only"
      },
      "enrollment_count": 171,
      "start_date": "2010-10",
      "completion_date": "2011-12",
      "has_results": false,
      "last_update_posted_date": "2012-05-10",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01216358"
    },
    {
      "nct_id": "NCT03077698",
      "title": "An Endometrial Cancer Study for Women With Recurrent or Persistent Endometrial Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Endometrial Cancer"
      ],
      "interventions": [
        {
          "name": "Sodium Cridanimod",
          "type": "DRUG"
        },
        {
          "name": "progestin therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Xenetic Biosciences, Inc.",
      "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": 25,
      "start_date": "2017-06-14",
      "completion_date": "2020-07-17",
      "has_results": true,
      "last_update_posted_date": "2022-06-07",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 25,
      "location_summary": "Burbank, California • Irvine, California • Los Angeles, California + 22 more",
      "locations": [
        {
          "city": "Burbank",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Santa Rosa",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03077698"
    },
    {
      "nct_id": "NCT07795606",
      "title": "An Observational Study to Learn How Mirena and Other Progestogen Treatments Are Used for Endometrial Protection in Women 40+ With a Uterus in the United States Receiving Estrogen Therapy, and Their Respective Health Outcomes",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Estrogen Therapy"
      ],
      "interventions": [
        {
          "name": "Estrogen therapy",
          "type": "DRUG"
        },
        {
          "name": "Mirena levonorgestrel-releasing intrauterine system",
          "type": "DEVICE"
        },
        {
          "name": "Other progestogen therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "40 Years and older · Female only"
      },
      "enrollment_count": 456000,
      "start_date": "2026-08-31",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-31",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 2,
      "location_summary": "Ann Arbor, Michigan • Eden Prairie, Minnesota",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Eden Prairie",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07795606"
    },
    {
      "nct_id": "NCT07436793",
      "title": "Progestins for the Treatment of Endometrial Cancer or Precancers of the Uterus Before Surgery, The Pro-Window Trial",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Endometrial Endometrioid Adenocarcinoma",
        "Endometrial Hyperplasia"
      ],
      "interventions": [
        {
          "name": "Biopsy Procedure",
          "type": "PROCEDURE"
        },
        {
          "name": "Curettage Procedure",
          "type": "PROCEDURE"
        },
        {
          "name": "Hysterectomy",
          "type": "PROCEDURE"
        },
        {
          "name": "Megestrol Acetate",
          "type": "DRUG"
        },
        {
          "name": "Progesterone Only Hormone Replacement Therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "New Mexico Cancer Research Alliance",
      "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": 140,
      "start_date": "2026-06-15",
      "completion_date": "2031-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-07-02",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 4,
      "location_summary": "Iowa City, Iowa • Albuquerque, New Mexico • Salt Lake City, Utah + 1 more",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Albuquerque",
          "state": "New Mexico"
        },
        {
          "city": "Salt Lake City",
          "state": "Utah"
        },
        {
          "city": "Charlottesville",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07436793"
    },
    {
      "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": "2026-09-24T06:00:26.066Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01546454"
    },
    {
      "nct_id": "NCT02969590",
      "title": "Regulation of Cervical Mucus Secretion",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Fertility",
        "Contraception"
      ],
      "interventions": [
        {
          "name": "Leuprolide acetate",
          "type": "DRUG"
        },
        {
          "name": "Estrogen and Progesterone Replacement",
          "type": "DRUG"
        },
        {
          "name": "Progestin",
          "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": "2015-03-29",
      "completion_date": "2017-08-23",
      "has_results": true,
      "last_update_posted_date": "2019-10-18",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02969590"
    },
    {
      "nct_id": "NCT03052270",
      "title": "Arabin Pessary Combine With Vaginal Progesterone Compare With Vaginal Progesterone Alone to Prevent Preterm Delivery in Singleton Pregnancies",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Focus: Prevent Preterm Delivery",
        "Incidental Short Cervix at Mid-trimester"
      ],
      "interventions": [
        {
          "name": "Arabin Pessary",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Illinois at Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 49 Years · Female only"
      },
      "enrollment_count": 57,
      "start_date": "2017-01",
      "completion_date": "2019-12-23",
      "has_results": false,
      "last_update_posted_date": "2020-08-05",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03052270"
    },
    {
      "nct_id": "NCT06866119",
      "title": "Effects of Estrogen on Heart Health in Women With Primary Ovarian Insufficiency",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Primary Ovarian Insufficiency",
        "Premature Menopause",
        "Metabolic Complications",
        "Endothelial Function (FMD)",
        "Estrogen Replacement Therapy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "30 Years to 40 Years · Female only"
      },
      "enrollment_count": 45,
      "start_date": "2026-06-22",
      "completion_date": "2029-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-09-08",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06866119"
    },
    {
      "nct_id": "NCT06856174",
      "title": "Menopausal HT for Women Living With HIV (HoT)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "HIV Infection",
        "Menopause"
      ],
      "interventions": [
        {
          "name": "Transdermal estradiol gel",
          "type": "DRUG"
        },
        {
          "name": "Micronized Progesterone",
          "type": "DRUG"
        },
        {
          "name": "Placebo for estradiol gel",
          "type": "DRUG"
        },
        {
          "name": "Placebo for micronized progesterone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "40 Years to 60 Years · Female only"
      },
      "enrollment_count": 105,
      "start_date": "2026-04-09",
      "completion_date": "2027-09-20",
      "has_results": false,
      "last_update_posted_date": "2026-05-22",
      "last_synced_at": "2026-09-24T06:00:26.066Z",
      "location_count": 23,
      "location_summary": "Birmingham, Alabama • Los Angeles, California • San Diego, California + 18 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Torrance",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06856174"
    }
  ]
}