Anovulation clinical trials
The registry lists 75 studies for Anovulation across more than 10 countries. 7 are recruiting or about to start. 32 of them are mainly about Anovulation (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-10.
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Example · made-up studies
Breast cancer · Recruiting: 2 came in, 3 changed
What changed in your saved searches, Oct 31 – Nov 6:
A study of drug A after surgery for early breast cancer
Came in · now Recruiting
Drug B with hormone therapy in advanced breast cancer
Changed
· Sites: 4 added, including Seoul and Busan
· Enrollment: 300 → 450 participants
Exercise during chemotherapy
Now Active, not recruiting
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Who runs them
University Magna Graecia (9) · Jagiellonian University (4) · Assiut University (3) · Emory University (2) · Milton S. Hershey Medical Center (2) · University of Illinois at Chicago (2) · Ferring Pharmaceuticals (2) · Sheffield Teaching Hospitals NHS Foundation Trust (2)
What is being tested here
Drugs under test in Anovulation studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted
| Drug | Open | Phase 3 | All |
|---|---|---|---|
| Vitamin D | 1 | 0 | 1 |
| Clomiphene | 0 | 3 | 15 |
| Metformin | 0 | 1 | 10 |
| Letrozole | 0 | 1 | 4 |
| Inositol | 0 | 0 | 3 |
| Sildenafil | 0 | 0 | 2 |
| Folic Acid | 0 | 0 | 2 |
| Tamoxifen | 0 | 1 | 1 |
| Salicylsalicylic acid | 0 | 0 | 1 |
| Flutamide | 0 | 0 | 1 |
Drug classes tested here SERMs 16 · Aromatase inhibitors 5
Coming up
Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.
All 2
- Nov 2026Ovarian Stromal Stiffness and Ovarian Reserve Parameters Via Transvaginal Shear Wave Elastography · Saglik Bilimleri Universitesi Gazi Yasargil Training and Research Hospital
- Sep 2027Half-dose vs Conventional-dose Cetrorelix in ICSI Cycles · Assiut University
Who these studies take
Of the 5 Anovulation studies recruiting now, 1 (20%) set no upper age limit and 4 (80%) stop at 75 or younger. 0 (0%) take children under 18. 4 (80%) are for women only and 0 (0%) for men only; 2 (40%) take healthy volunteers.
| Age | Women | Men |
|---|---|---|
| 10 | 0 (0%) | 0 (0%) |
| 18 | 5 (100%) | 1 (20%) |
| 30 | 5 (100%) | 1 (20%) |
| 40 | 5 (100%) | 1 (20%) |
| 50 | 1 (20%) | 1 (20%) |
| 65 | 1 (20%) | 1 (20%) |
| 75 | 1 (20%) | 1 (20%) |
| 85 | 1 (20%) | 1 (20%) |
Across all 75 studies, recruiting or not: 93% stop at 75 or younger and 93% at 65; 5% take children; 97% are for women only and 0% for men only; 32% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.
What changed recently
From the registry's own updates since Oct 11, 2026.
Results posted1
- Inositol Supplementation to Treat PCOS (INSUPP-PCOS)Oct 28, 2026NCT03864068
Studies
Recruiting first, then most recently updated. Showing 50 of 75. Browse all 75 → or search them.
- Half-dose vs Conventional-dose Cetrorelix in ICSI CyclesNot yet recruitingNCT07836400
- Sperm Preparation Prior to Intrauterine Insemination StudyRecruitingNCT05693220Not applicable1 country
- Ovarian Stromal Stiffness and Ovarian Reserve Parameters Via Transvaginal Shear Wave ElastographyNot yet recruitingNCT07773337Not applicable1 country
- Letrozole Extended vs Traditional Therapy for Ovulation Induction in Women With PCOS (PROLEx-PCOS)RecruitingNCT07159880Not applicable1 country
- The REgistry of Very Early Estrogen and AnovuLationRecruitingNCT065834081 country
- Effect of Vitamin D on Ovulation Rate in Women With Polycystic Ovary SyndromeRecruitingNCT04650880Not applicable1 country
- Phenotype and Epidemiology of the Polycystic Ovary Syndrome (PCOS) in Colombia (PEP - Colombia) Study.RecruitingNCT059261151 country
- Inositol Supplementation to Treat PCOS (INSUPP-PCOS)CompletedNCT03864068Phase 21 country
- Clomiphene Citrate Alone Versus Clomiphene Plus Metformin as First Line Approach for the Treatment of Anovulation in Infertile Patients With Polycystic Ovary SyndromeCompletedNCT07872501Not applicable1 country
- Letrozole vs. Clomiphene Citrate Plus Tamoxifen for Ovulation Induction and Pregnancy Outcomes.Active, not recruitingNCT07616973Phase 31 country
- Study of Mechanisms of Anovulation in Polycystic Ovary SyndromeCompletedNCT004928821 country
- Diagnostics of Clinical HyperandrogenismCompletedNCT065304981 country
- Uterine and Endometrial Volume in PCOS and HPODCompletedNCT062116081 country
- Quality of Life in Normogonadotropic AnovulationCompletedNCT062089951 country
- Myo-inositol Plus Alpha-lactalbumin in PCOS Myo-inositol-resistant PatientsCompletedNCT03667443Not applicable1 country
- Treating Inflammation in Polycystic Ovary Syndrome to Ameliorate Ovarian DysfunctionCompletedNCT03229408Phase 21 country
- Evaluation of Ovarian Morphology and Function in Overweight Women During Weight LossCompletedNCT01785719Not applicable1 country
- Androgen Excess as a Cause for Adipogenic Dysfunction in PCOS WomenCompletedNCT01889199Phase 21 country
- Subclinical Hypothyroidism and Normogonadotropic AnovulationCompletedNCT057827251 country
- Feasibility and Safety of Fasting in Fertility TreatmentCompletedNCT04942457Not applicable1 country
- Protocol for Drug Use Investigation of Follistim Injection (Study P06132)(COMPLETED)CompletedNCT00920634
- The Cycle Disturbances, OLigomenorrhea and Amenorrhea (COLA) Study & BiobankStatus unknownNCT023090471 country
- An RCT of Metformin Vs Orlistat in Obese Anovulatory WomenCompletedNCT00292799Not applicable1 country
- Administration of Single High Dose Letrozole for Ovulation InductionCompletedNCT02703649Phase 41 country
- Ovarian Response to Recombinant Follicle Stimulating Hormone in Women With PCOSCompletedNCT03252223Phase 41 country
- Hysteroscopy in Chronic AnovulationWithdrawnNCT03545945Not applicable1 country
- A Phase III Clinical Study to Compare the Efficacy and Safety of DA-3801 and That of Gonal-F®CompletedNCT01820728Phase 31 country
- LOD vs Gn in Anovulatory PCOs Resistant to First Line AgentsStatus unknownNCT04325295Not applicable
- Progestin-induced Endometrial Shedding in PCOS (The PIES in PCOS Study)TerminatedNCT01718444Not applicable1 country
- Nimodipine to Prevent LH Surge During Ovulation Induction: Blinded Placebo-controlled RCTCompletedNCT01672801Not applicable1 country
- Sildenafil Vaginal Gel Co-treatment With Clomiphene Citrate in Infertile Women With Thin EndometriumCompletedNCT02710981Not applicable
- Hormonal Effects of the Oral Gonadotropin Releasing Hormone (GnRH) Antagonist at Different Periods of the Menstrual CycleStatus unknownNCT04060992Phase 4
- Efficacy Study of Raloxifene to Induce Ovulation in Polycystic Ovarian SyndromeTerminatedNCT01607320Not applicable1 country
- To Study The Influence Of Genomic Factors On Metabolism And Effects Of Clomiphene In Asian Normogonadotrophic Anovulatory Patients.CompletedNCT025480391 country
- Using CPAP to Improve Menstruation in Women With Polycystic Ovarian Syndrome and Obstructive Sleep ApneaWithdrawnNCT031558281 country
- Comparison of Anastrozole Verses Clomiphene Citrate in Stimulating Follicular Growth and Ovulation in Infertile Women With Ovulatory DysfunctionCompletedNCT00213148Phase 21 country
- Endometrial Thickness and Subendometrial Vascularity in Anovulatory Polycystic Ovarian Syndrome Patients Treated by MetforminStatus unknownNCT03486626Phase 41 country
- Lifestyle Intervention and Metformin for Women With Polycystic Ovary Syndrome (PCOS)CompletedNCT00151411Phase 21 country
- Improved Effects of MI Plus Alpha-LA in PCOSCompletedNCT03422289Not applicable1 country
- Traditional Clomiphene Citrate Administration vs. Stair-step ApproachCompletedNCT01008319Phase 31 country
- Serum Kisspeptin Levels in Infertile WomenCompletedNCT030183141 country
- The Effect of Sildenafil Citrate on the Success Rate of Ovulation Induction Using ClomipheneCompletedNCT02663830Phase 2
- PCOS Twin Study - Environmental Factors in the Development of Polycystic Ovary Syndrome, Phase 2CompletedNCT004442881 country
- Circulating Androgen Levels Are Not Affected by the Administration of Vaginal Micronized Progesterone for Withdrawal Bleeding in Patients With Polycystic Ovarian SyndromeCompletedNCT03088046Not applicable
- Concomitant CC and E2 Versus CC Alone in Ovulation InductionStatus unknownNCT02186782Phase 41 country
- Letrozole Versus Clomifene Citrate for Ovulation InductionCompletedNCT00478504Phase 41 country
- Trial to Assess the Clinical Efficacy and Safety of MSJ-0011 in Inducing Ovulation in Anovulatory or Oligo-ovulatory Japanese WomenCompletedNCT01653743Phase 31 country
- The Effects of an Intensive Lifestyle Intervention on Reproductive OutcomesCompletedNCT01894074Not applicable1 country
- Metformin in Infertile PCOS PatientsStatus unknownNCT00501904Phase 41 country
- Letrozole Versus Clomiphene Citrate for Ovulation Induction in Women With Poly Cystic Ovary Syndrome ( PCOS )Status unknownNCT02551367Phase 2