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Effect of Metformin added to oral combined pills on the REstoration of Functional Ovulation and Regular Menstruation in PCOS: The REFORM Trial, A Double-blinded Randomized Controlled Trial.

Effect of Metformin added to oral combined pills on the REstoration of Functional Ovulation and Regular Menstruation in PCOS: The REFORM Trial, A Double-blinded Randomized Controlled Trial.

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
TCTR
Registry ID
TCTR20260329009
Enrollment
72
Registered
2026-03-29
Start date
2026-02-13
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Polycystic ovary disease PCOS Polycystic ovary syndrome Metformin Menstrual irregularity

Interventions

metformin 850 mg 1 tab per oral after breakfast ethinyl estradiol 0.03 mg plus levonorgestrel 0.15 mg 1 tab per oral at the same time of each day,placebo1 tab per oral after breakfast ethinyl estradio
Active Comparator Drug,Placebo Comparator Drug
metformin and oral contraceptive pill,placebo and oral contraceptive pill

Sponsors

Sunpasitthiprasong hospital
Lead Sponsor

Eligibility

Sex/Gender
Female
Age
18 Years to 45 Years

Inclusion criteria

Inclusion criteria: 1. Female patients who have been diagnosed with polycystic ovary syndrome (PCOS) according to the Rotterdam 2003 diagnostic criteria, which require at least 2 out of the following 3 features: - Irregular menstrual cycles - Clinical and/or biochemical evidence of hyperandrogenism - Polycystic ovaries on ultrasound examination 2. Willingness to participate in the research study

Exclusion criteria

Exclusion criteria: 1. Allergy to metformin 2. Allergy to medications containing ethinyl estradiol or levonorgestrel 3. Pregnant or breastfeeding, or planning to become pregnant during the study 4. History of venous thromboembolism, ischemic or hemorrhagic stroke, ischemic heart disease, or uncontrolled hypertension 5. History of or current breast cancer 6. Patients with diabetes mellitus 7. Impaired kidney function (eGFR <60 ml/min/1.73m2) 8. Impaired liver function (ALT or AST more than 2 times the normal upper limit) 9. Use of metformin, combined oral contraceptives, weight-loss medications, antidiabetic drugs, anti-androgens, or ovulation induction drugs within 3 months prior to screening

Design outcomes

Primary

MeasureTime frame
time to menstruation after medications discontinuation 14 weeks after medications discontinuation menstruation record

Secondary

MeasureTime frame
changes of HDL/TG ratio, HbA1c, and fasting blood sugar before medication and 14 weeks after medications discontinuation laboratory collect and record,change of lipid profile before medication and 14 weeks after medications discontinuation laboratory collect and record,changes of body mass index, body fat mass, waist to hip ratio, and abdominal fat mass before medication and 14 weeks after medications discontinuation Body Composition Analyzer

Countries

Thailand

Contacts

Public ContactPreechaya Prasitpuripreecha

Sunpasitthiprasong hospital

frameny36@gmail.com66815614593

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 10, 2026