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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Menstrual Cycle Clear all
Completed No phase listed Observational Accepts healthy volunteers

Menstrual Cycle Study

NCT05999123
View directory record Official record
Conditions
Menstruation, Ovulation
Interventions
Not listed
Lead sponsor
Fitbit LLC
Industry
Eligibility
18 Years to 42 Years · Female only
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational

Stellate Ganglion Block to Treat Long COVID 19 Case Series

NCT05812209
View directory record Official record
Conditions
Long COVID, Long Covid19, Post-COVID-19 Syndrome, Post Acute COVID-19 Syndrome, Dysautonomia, Anosmia, Dysgeusia, Brain Fog, Muscle Pain, Shortness of Breath, Dizziness, Fatigue Post Viral, Cough, Menstrual Cycle Abnormal, Pain
Interventions
Stellate Ganglion Block
Procedure
Lead sponsor
Metamorphosis LTD
Other
Eligibility
Not listed
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Cañon City, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 12, 2023 · Synced Jul 22, 2026, 6:06 PM EDT
Completed Phase 3 Interventional

Timing of Menstrual Cycle and Surgery in Treating Premenopausal Women With Stage I, Stage II, or Stage III Breast Cancer

NCT00005079
View directory record Official record
Conditions
Breast Cancer
Interventions
conventional surgery
Procedure
Lead sponsor
Jonsson Comprehensive Cancer Center
Other
Eligibility
Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2004
U.S. locations
2
States / cities
La Jolla, California • Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 14, 2013 · Synced Jul 22, 2026, 6:06 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Examining the Role of Female Endogenous Sex Hormones in Eccentric Exercise

NCT05934708
View directory record Official record
Conditions
Inflammatory Response
Interventions
Eccentric leg extension
Behavioral
Lead sponsor
University of Southern California
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Jul 22, 2026, 6:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Impact of GABA-Enhancing Agents on Cortical GABA Concentrations Across the Menstrual Cycle in Women

NCT00676026
View directory record Official record
Conditions
Healthy
Interventions
Fluoxetine, Zolpidem, Progesterone
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 31, 2017 · Synced Jul 22, 2026, 6:06 PM EDT
Terminated Phase 2 Interventional

Neurocognitive Mechanisms of Perimenstrual Estrogen Effects on Suicidality

NCT06191289
View directory record Official record
Conditions
Suicide
Interventions
Transdermal Estradiol, Placebo
Drug · Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
20 Years to 40 Years · Female only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Ultrasonographic Evaluation of Anovulatory Disorders in Lean and Overweight Women

NCT03306849
View directory record Official record
Conditions
Menstrual Cycle Abnormal, PCOS, Overweight, Obesity
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2023
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 8, 2024 · Synced Jul 22, 2026, 6:06 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Menstrual Cycle-Synced Neuromuscular Training

NCT06983184
View directory record Official record
Conditions
ACL Injuries
Interventions
MC-synced NTP, Blinded NTP
Other
Lead sponsor
Sophia Ulman
Other
Eligibility
13 Years to 19 Years · Female only
Enrollment
148 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Frisco, Texas
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational

Effects of Raloxifene on the Uterus and Ovaries of Premenopausal Patients

NCT00001837
View directory record Official record
Conditions
Breast Cancer, Breast Neoplasm
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cyclic Variation in Micronutrient Concentrations and Plasma Volume

NCT03422809
View directory record Official record
Conditions
Plasma Volume, Micronutrients, Menstrual Cycle
Interventions
Not listed
Lead sponsor
Alison Gernand
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
State College, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 31, 2019 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Monitoring Functional Variation in the Breast During Menstrual Cycle by Using Diffuse Optical Spectroscopy

NCT00540306
View directory record Official record
Conditions
Accessory; Breast Tissue
Interventions
Diffuse Optical Spectroscopy
Device
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2012
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Oct 19, 2022 · Synced Jul 22, 2026, 6:06 PM EDT
Active, not recruiting No phase listed Observational

Menstrual Cycle Maintenance and Quality of Life: A Prospective Study

NCT00589654
View directory record Official record
Conditions
Amenorrhea, Menstrual Cycle, Breast Cancer
Interventions
Questionnaire
Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
810 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 25, 2026 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Impact of Sleep Disruption on the Menstrual Cycle

NCT00456222
View directory record Official record
Conditions
Sleep, Circadian Rhythm, Menstrual Cycle
Interventions
Disrupting or changing the timing or the duration of sleep
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 20, 2009 · Synced Jul 22, 2026, 6:06 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Impact of Metformin in Teens With Polycystic Ovary Syndrome (PCOS) on Oral Contraceptive Therapy

NCT00283816
View directory record Official record
Conditions
Polycystic Ovary Syndrome
Interventions
Metformin, Oral Contraceptive Pill, Lifestyle Management Program, Quality of Life Questionnaire, Oral Glucose Tolerance Test, Blood work, Abdominal Ultra Sound, Dual-energy x-ray absorptiometry (DEXA scan), placebo
Drug · Behavioral · Procedure
Lead sponsor
University of Rochester
Other
Eligibility
12 Years to 18 Years · Female only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated May 14, 2015 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational

Combined Hormone Replacement in Menstrually-Related Mood Disorders

NCT00005011
View directory record Official record
Conditions
Premenstrual Syndrome, Depression
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 50 Years · Female only
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational

Breast Imaging Studies in Women at High Genetic Risk of Breast Cancer: Menstrual Cycle Study

NCT00006425
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 100 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 26, 2020 · Synced Jul 22, 2026, 6:06 PM EDT
Not listed Not applicable Interventional

Estradiol vs Lysteda in Treatment of Heavy Menstrual Bleeding

NCT01659008
View directory record Official record
Conditions
Menstrual Cycle and Uterine Bleeding Disorders
Interventions
Estradiol, Lysteda
Drug
Lead sponsor
Kay I Waud MD PhD
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
2
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 15, 2015 · Synced Jul 22, 2026, 6:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Menstrual Cycle Hormones and Eating Behavior

NCT01407692
View directory record Official record
Conditions
Dietary Habits, Food Preference
Interventions
Not listed
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 35 Years · Female only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2017 · Synced Jul 22, 2026, 6:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of The Cycle SyncingⓇ Method: A 12-Week Virtual Clinical Trial

NCT07286136
View directory record Official record
Conditions
Menstrual Cycle Disorder, Menstrual Symptoms, Hormonal Imbalance
Interventions
MyFLO App
Dietary Supplement
Lead sponsor
FLO LIVING, LLC
Industry
Eligibility
22 Years to 42 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Jul 22, 2026, 6:06 PM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Changes in Bleeding and Clotting During the Menstrual Cycle

NCT00480545
View directory record Official record
Conditions
Von Willebrand's Disorder, Healthy
Interventions
Not listed
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 50 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 4, 2014 · Synced Jul 22, 2026, 6:06 PM EDT
Terminated No phase listed Observational

Change in Thrombin Generation Potential and Thromboelastography During the Menstrual Cycle

NCT00178542
View directory record Official record
Conditions
Von Willebrand Disease
Interventions
Not listed
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 5, 2013 · Synced Jul 22, 2026, 6:06 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Menstrual Phase Endometrial Scratch in IUI Cycles

NCT04641598
View directory record Official record
Conditions
Fertility Disorders, Fertility Issues
Interventions
Endometrial Scratch, Sham procedure
Procedure
Lead sponsor
Carilion Clinic
Other
Eligibility
18 Years to 37 Years · Female only
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 5, 2021 · Synced Jul 22, 2026, 6:06 PM EDT
Completed Phase 1 Interventional

Dutasteride to Treat Women With Menstrually Related Mood Disorders

NCT00082043
View directory record Official record
Conditions
Premenstrual Syndrome, PMS, Healthy, Depression
Interventions
Dutasteride, Placebo oral capsule
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
30 Years to 50 Years · Female only
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Jul 22, 2026, 6:06 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Menstrual Cycle Effects on Smoking Cessation and Cue Reactivity

NCT00664755
View directory record Official record
Conditions
Nicotine Dependence
Interventions
varenicline, transdermal nicotine patch
Drug · Device
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated May 23, 2018 · Synced Jul 22, 2026, 6:06 PM EDT