{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Irregular+Menstrual+Cycles",
    "query": {
      "condition": "Irregular Menstrual Cycles"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 14,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Irregular+Menstrual+Cycles&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-22T18:46:38.535Z",
  "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": "NCT00392873",
      "title": "Increased Calorie Intake to Reverse Energy Deficiency in Exercising Women: Impact on Bone and Menstrual Cyclicity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Menstrual Irregularity"
      ],
      "interventions": [
        {
          "name": "EAMD+Calories",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Penn State University",
      "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": 233,
      "start_date": "2006-09",
      "completion_date": "2014-12",
      "has_results": false,
      "last_update_posted_date": "2017-05-08",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "University Park, Pennsylvania",
      "locations": [
        {
          "city": "University Park",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00392873"
    },
    {
      "nct_id": "NCT01059968",
      "title": "Low Energy Availability, Menstrual Irregularity, and Low Bone Mass",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bone Density",
        "Energy Availability"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "USDA, Western Human Nutrition Research Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": "17 Years",
        "sex": "FEMALE",
        "summary": "15 Years to 17 Years · Female only"
      },
      "enrollment_count": 45,
      "start_date": "2008-09",
      "completion_date": "2009-12",
      "has_results": false,
      "last_update_posted_date": "2011-06-23",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01059968"
    },
    {
      "nct_id": "NCT04940013",
      "title": "Missed Period Pill Study",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Menstrual Regulation",
        "Menstrual Irregularity"
      ],
      "interventions": [
        {
          "name": "Misoprostol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 17,
      "start_date": "2021-10-25",
      "completion_date": "2025-09-01",
      "has_results": false,
      "last_update_posted_date": "2026-01-20",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "Fresno, California",
      "locations": [
        {
          "city": "Fresno",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04940013"
    },
    {
      "nct_id": "NCT01473186",
      "title": "Study of Menstrual Irregularities and Endometrial Pathology in Women Undergoing Bariatric Surgery",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Morbid Obesity",
        "Endometrial Pathology",
        "Menstrual Irregularities"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Virginia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 75 Years · Female only"
      },
      "enrollment_count": 100,
      "start_date": "2011-01",
      "completion_date": "2015-01",
      "has_results": false,
      "last_update_posted_date": "2015-06-02",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "Charlottesville, Virginia",
      "locations": [
        {
          "city": "Charlottesville",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01473186"
    },
    {
      "nct_id": "NCT00559390",
      "title": "Research Study for Children With a Mother or Sister With Polycystic Ovary Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Precursors to PCOS"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "12 Years",
        "sex": "FEMALE",
        "summary": "8 Years to 12 Years · Female only"
      },
      "enrollment_count": 136,
      "start_date": "2006-07",
      "completion_date": "2012-10",
      "has_results": false,
      "last_update_posted_date": "2013-04-05",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00559390"
    },
    {
      "nct_id": "NCT00283816",
      "title": "Impact of Metformin in Teens With Polycystic Ovary Syndrome (PCOS) on Oral Contraceptive Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Polycystic Ovary Syndrome"
      ],
      "interventions": [
        {
          "name": "Metformin",
          "type": "DRUG"
        },
        {
          "name": "Oral Contraceptive Pill",
          "type": "DRUG"
        },
        {
          "name": "Lifestyle Management Program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Quality of Life Questionnaire",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Oral Glucose Tolerance Test",
          "type": "PROCEDURE"
        },
        {
          "name": "Blood work",
          "type": "PROCEDURE"
        },
        {
          "name": "Abdominal Ultra Sound",
          "type": "PROCEDURE"
        },
        {
          "name": "Dual-energy x-ray absorptiometry (DEXA scan)",
          "type": "PROCEDURE"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL",
        "PROCEDURE"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "18 Years",
        "sex": "FEMALE",
        "summary": "12 Years to 18 Years · Female only"
      },
      "enrollment_count": 36,
      "start_date": "2006-01",
      "completion_date": "2008-01",
      "has_results": true,
      "last_update_posted_date": "2015-05-15",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00283816"
    },
    {
      "nct_id": "NCT01154192",
      "title": "Theca Cell Function in Adolescents With Polycystic Ovary Syndrome (PCOS)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "PCOS"
      ],
      "interventions": [
        {
          "name": "Dexamethasone",
          "type": "DRUG"
        },
        {
          "name": "recombinant human chorionic gonadotropin (r-hCG)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "18 Years",
        "sex": "FEMALE",
        "summary": "12 Years to 18 Years · Female only"
      },
      "enrollment_count": 24,
      "start_date": "2011-08",
      "completion_date": "2014-09",
      "has_results": true,
      "last_update_posted_date": "2019-04-30",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "La Jolla, California",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01154192"
    },
    {
      "nct_id": "NCT07169136",
      "title": "Effects of Glucagon-like Peptide-1 (GLP-1) Agonist in Neuro-reproductive Function in Obese Adolescent Females With Polycystic Ovary Syndrome (PCOS)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Polycystic Ovarian Syndrome in Adolescent Females",
        "Obesity (Disorder)"
      ],
      "interventions": [
        {
          "name": "GLP-1 Receptor Agonists",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Nemours Children's Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "18 Years",
        "sex": "FEMALE",
        "summary": "12 Years to 18 Years · Female only"
      },
      "enrollment_count": 20,
      "start_date": "2025-09-11",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2025-09-16",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07169136"
    },
    {
      "nct_id": "NCT01483118",
      "title": "Cinnamon Extract on Menstrual Cycles in PolyCystic Ovary Syndrome (PCOS)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Polycystic Ovary Syndrome"
      ],
      "interventions": [
        {
          "name": "Cinnamon Extract",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Rogerio A. Lobo",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "38 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 38 Years · Female only"
      },
      "enrollment_count": 45,
      "start_date": "2011-03",
      "completion_date": "2014-04",
      "has_results": true,
      "last_update_posted_date": "2017-10-03",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01483118"
    },
    {
      "nct_id": "NCT01927471",
      "title": "Nutritional and Metabolic Correlates of Ovarian Morphology in Women With Polycystic Ovary Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Polycystic Ovary Syndrome (PCOS)",
        "Menstrual Irregularity"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "48 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 48 Years · Female only"
      },
      "enrollment_count": 129,
      "start_date": "2011-09",
      "completion_date": "2019-07",
      "has_results": false,
      "last_update_posted_date": "2024-02-09",
      "last_synced_at": "2026-07-22T18:46:38.535Z",
      "location_count": 3,
      "location_summary": "Ithaca, New York • Rochester, New York",
      "locations": [
        {
          "city": "Ithaca",
          "state": "New York"
        },
        {
          "city": "Rochester",
          "state": "New York"
        },
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01927471"
    }
  ]
}