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Showing 1–24 of 118 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Menstrual Cycle Clear all
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 Sep 7, 2026, 1:50 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Comparison of Blood Levels of Two Formulations of the Selective Hormone Receptor Modulator CDB-2914

NCT00041899
View directory record Official record
Conditions
Healthy
Interventions
CDB-2914, COB-2914
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
Female only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 7, 2026, 1:50 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Contraception and Menstrual Cycle Effect on Pharmacokinetics, Pharmacodynamics and Safety in Tenofovir Vaginal Gel Use

NCT01421368
View directory record Official record
Conditions
HIV Prevention
Interventions
Tenofovir 1% vaginal gel, Depo-medroxyprogesterone acetate (DMPA), Oral contraceptive: LNG 150 mcg and EE 30 mcg
Drug
Lead sponsor
CONRAD
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania • Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 9, 2015 · Synced Sep 7, 2026, 1:50 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Neural and Hormonal Influences on Sex Differences in Risk for AUD

NCT04929288
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
Alcohol
Drug
Lead sponsor
Jessica Weafer
Other
Eligibility
21 Years to 26 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 7, 2026, 1:50 AM EDT
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 Sep 7, 2026, 1:50 AM EDT
Recruiting Not applicable Interventional

Impact of MEnstruation on Glycemic Response and Exercise In Females With Type 1 Diabetes

NCT06297980
View directory record Official record
Conditions
Type 1 Diabetes, Hypoglycemia, Hyperglycaemia Due to Type 1 Diabetes Mellitus, Menstruation Disturbances
Interventions
Personalized modifications to treatment to address menstrual cycle effects on glycemia
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 7, 2026, 1:50 AM EDT
Completed No phase listed Observational

Cycle and Ovulation Study Expansion

NCT05852951
View directory record Official record
Conditions
Menstruation
Interventions
Not listed
Lead sponsor
Apple Inc.
Industry
Eligibility
14 Years and older · Female only
Enrollment
698 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated May 9, 2023 · Synced Sep 7, 2026, 1:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Role of Hormones in Susceptibility to Seizures in Women With Epilepsy

NCT00044252
View directory record Official record
Conditions
Epilepsy
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 45 Years · Female only
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 7, 2026, 1:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Relationship Between the Menstrual Cycle and Heart Disease in Women

NCT01546454
View directory record Official record
Conditions
Coronary Heart Disease
Interventions
Ethinyl Estradiol-Levonorgestrel combination, leuprolide acetate, Estradiol, Progesterone
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 21, 2017 · Synced Sep 7, 2026, 1:50 AM 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 Sep 7, 2026, 1:50 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Impact of Menstrual Cycle on Antiretroviral Pharmacokinetics in Healthy Women

NCT00869960
View directory record Official record
Conditions
Healthy
Interventions
tenofovir, emtricitabine, atazanavir, ritonavir
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 5, 2013 · Synced Sep 7, 2026, 1:50 AM EDT
Completed Not applicable Interventional

Delivering Transcutaneous Auricular Neurostimulation to Reduce Heavy Menstrual Bleeding in Patients With and Without Von Willebrand Disease

NCT06064851
View directory record Official record
Conditions
Von Willebrand Disease, Type 1, Heavy Menstrual Bleeding
Interventions
Volta System
Device
Lead sponsor
Five Liters, Inc.
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Apr 26, 2025 · Synced Sep 7, 2026, 1:50 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Research Study Exploring How Musculoskeletal Function and the Autonomic Nervous System Relate to Visceral Pain in Women With and Without Dysmenorrhea (Painful Periods).

NCT07209566
View directory record Official record
Conditions
Dysmenorrhea, Dysmenorrhea Primary, Visceral Pain, Menstrual Pain
Interventions
Visceral Pain Stimulus
Diagnostic Test
Lead sponsor
Azusa Pacific University
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Azusa, California
Source: ClinicalTrials.gov public record
Updated Oct 6, 2025 · Synced Sep 7, 2026, 1:50 AM EDT
Not yet recruiting Not applicable Interventional

Female Concussion Head Cooling

NCT07303933
View directory record Official record
Conditions
Concussion (Diagnosis), Concussion Post Syndrome, Concussion, Mild
Interventions
Brain Cooling
Device
Lead sponsor
Penn State University
Other
Eligibility
18 Years to 27 Years · Female only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 25, 2025 · Synced Sep 7, 2026, 1:50 AM EDT
Completed Phase 3 Interventional

Study Evaluating Levonorgestrel/Ethinyl Estradiol (LNG/EE) in PMS

NCT00161681
View directory record Official record
Conditions
Premenstrual Syndrome
Interventions
Levonorgestrel/Ethinyl Estradiol
Drug
Lead sponsor
Wyeth is now a wholly owned subsidiary of Pfizer
Industry
Eligibility
18 Years to 49 Years · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
48
States / cities
Huntsville, Alabama • Peoria, Arizona • Phoenix, Arizona + 40 more
Source: ClinicalTrials.gov public record
Updated Feb 7, 2013 · Synced Sep 7, 2026, 1:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Study to Evaluate the Efficacy of Elix's Cycle Balance and Its Impact on PMS and Menstrual Symptoms

NCT05145257
View directory record Official record
Conditions
PMS, Menstrual Pain
Interventions
Elix Cycle Balance
Dietary Supplement
Lead sponsor
Zenchi, Inc.
Industry
Eligibility
18 Years to 36 Years · Female only
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Dec 31, 2024 · Synced Sep 7, 2026, 1:50 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Preconception Reproductive Knowledge Promotion (PREKNOP)

NCT01849900
View directory record Official record
Conditions
Pregnancy
Interventions
Knowing your body, Healthy Lifestyle
Other · Behavioral
Lead sponsor
Calvin College
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Grand Rapids, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 10, 2017 · Synced Sep 7, 2026, 1:50 AM 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 Sep 7, 2026, 1:50 AM EDT
Completed No phase listed Observational

A Study to Look at Antiepileptic Drug Levels While on Lamictal or Depakote With or Without an Oral Contraceptive

NCT00296413
View directory record Official record
Conditions
Epilepsy
Interventions
Not listed
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
13 Years to 45 Years · Female only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 13, 2017 · Synced Sep 7, 2026, 1:50 AM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Efficacy of Seasonique for the Treatment of Cyclic Pelvic Pain

NCT00196313
View directory record Official record
Conditions
Dysmenorrhea
Interventions
levonorgestrel/EE 0.15/0.03 and EE 0.01 mg tablets, Placebo tablet
Drug
Lead sponsor
Duramed Research
Industry
Eligibility
Up to 17 Years · Female only
Enrollment
95 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
13
States / cities
Denver, Colorado • Decatur, Georgia • Louisville, Kentucky + 10 more
Source: ClinicalTrials.gov public record
Updated Sep 21, 2016 · Synced Sep 7, 2026, 1:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Nutritional and Metabolic Correlates of Ovarian Morphology in Women With Polycystic Ovary Syndrome

NCT01927471
View directory record Official record
Conditions
Polycystic Ovary Syndrome (PCOS), Menstrual Irregularity
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 48 Years · Female only
Enrollment
129 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2019
U.S. locations
3
States / cities
Ithaca, New York • Rochester, New York
Source: ClinicalTrials.gov public record
Updated Feb 8, 2024 · Synced Sep 7, 2026, 1:50 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Resistance Training and Sex Hormone Concentrations During the Menstrual Cycle

NCT04163380
View directory record Official record
Conditions
Women's Health
Interventions
Resistance Training
Behavioral
Lead sponsor
Southern Illinois University Edwardsville
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Edwardsville, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 17, 2020 · Synced Sep 7, 2026, 1:50 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Effect of 'Cramp Bites' on Period Cramps in Women Aged 18-25

NCT06227676
View directory record Official record
Conditions
Dysmenorrhea Primary, Dysmenorrhea, Menstrual Discomfort, Menstrual Problem, Menstrual Cycle Abnormal, Menstrual Pain, Period Pain, Period Problem, PMS, Premenstrual Syndrome, PCOS, PCOS (Polycystic Ovary Syndrome) of Bilateral Ovaries, PCOS (Polycystic Ovary Syndrome) of Left Ovary, PCOS (Polycystic Ovary Syndrome) of Right Ovary, Polycystic Ovary Syndrome, Premenstrual Dysphoric Disorder, Cramps, Ovarian Cysts
Interventions
Cramp Bites by Aunt Flo's Kitchen
Dietary Supplement
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2024 · Synced Sep 7, 2026, 1:50 AM 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 Sep 7, 2026, 1:50 AM EDT