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PCOS (Polycystic Ovary Syndrome)FMT-PMOSNCT07746635

Fecal Microbiota Transplantation for Obese Women With Polyendocrine Metabolic Ovarian Syndrome

A study testing oral Fecal Microbiota Transplantation in people with PCOS (Polycystic Ovary Syndrome), run by Shanghai Changzheng Hospital at 1 site in China.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This prospective, two-stage clinical trial aims to evaluate the safety, preliminary efficacy, and reproductive outcomes of oral Fecal Microbiota Transplantation (FMT) freeze-dried capsules in overweight and obese patients with Polyendocrine Metabolic Ovarian Syndrome (PMOS) undergoing Frozen-Thawed Embryo Transfer… Read more about this study

Who is it for?
Ages 20 to 40 years, women only
Conditions the study is for
PCOS (Polycystic Ovary Syndrome)
What is being tested?
oral Fecal Microbiota Transplantation
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
201 participants
Where
1 siteChina
Study dates
15 Apr 2025to 31 Dec 2028
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 20 to 40 years
  • Women only
  • No healthy volunteers
  • Adult

Who may be able to join

  • 1. Females aged 20 to 40 years old.
  • 2. Meeting the diagnostic criteria for Polyendocrine Metabolic Ovarian Syndrome (PMOS).
  • 3. Body Mass Index (BMI): >24.0 kg/m²(covering overweight and obese patients according to Asian criteria, addressing the actual recruited cohort ranging from 24.0 kg/m² upwards).
  • 4. Scheduled to undergo Frozen-Thawed Embryo Transfer (FET) at the Reproductive Medicine Center.
  • 5. Voluntary participation with signed Informed Consent Form (ICF).

Who cannot join

  • Age < 20 or > 40 years.
  • Pregnancy or lactation.
  • Other endocrine disorders (e.g., Cushing's syndrome, thyroid dysfunction); severe organ dysfunction or impaired intestinal mucosal barrier; use of antibiotics, probiotics, or prebiotics within 1 month.
  • Use of ovulation-modifying or anti-androgen drugs within 3 months; severe psychiatric disorders.
  • Concurrent participation in other clinical trials.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Ningxia Sun, Chief contact

13817975897

suesunchzh@126.com

Yichi Zhang, MD contact

19121277344

zorzhang@163.com

China1 site, 1 recruiting
  • Center for Reproductive Medicine,Shanghai Changzheng Hospital

    Shanghai, Shanghai Municipality, 200003

    Jiping Xu, 021-81886702, zorzhang@163.com

    Yichi Zhang, zorzhang@163.com

    Recruiting

Other trials in China

About this study

Official title: Fecal Microbiota Transplantation for the Treatment of Polyendocrine Metabolic Ovarian Syndrome in Obese Women:A Phase Ⅰ/ⅡSingle-Arm Pilot Study and Planned Randomized Controlled Trial

This prospective, two-stage clinical trial aims to evaluate the safety, preliminary efficacy, and reproductive outcomes of oral Fecal Microbiota Transplantation (FMT) freeze-dried capsules in overweight and obese patients with Polyendocrine Metabolic Ovarian Syndrome (PMOS) undergoing Frozen-Thawed Embryo Transfer (FET).The study is implemented in two sequential phases:

Phase Ⅰ (Pilot Exploration): A prospective, open-label, single-arm exploratory study in an initial evaluable cohort (n=11) to evaluate preliminary safety, dynamic gut microbiota colonization, endocrine/metabolic parameters, and pregnancy outcomes following FET.

Phase Ⅱ (Confirmatory RCT): A planned multicenter, prospective, randomized controlled trial (RCT) designed to validate the clinical efficacy and underlying mechanisms of oral FMT capsules compared with control interventions, based on findings established in Phase Ⅰ.

Read the detailed description

Background:Polyendocrine Metabolic Ovarian Syndrome (PMOS), formerly recognized as Polycystic Ovary Syndrome (PCOS), is a systemic disorder characterized by hyperandrogenism, insulin resistance, chronic low-grade inflammation, and gut microbiota dysbiosis. These abnormalities frequently impair endometrial receptivity, oocyte quality, and clinical pregnancy outcomes in assisted reproductive technology (ART) cycles. Fecal Microbiota Transplantation (FMT) offers a targeted approach to restore gut microecology and alleviate metabolic-endocrine dysfunction.

Study Design:This study adopts a prospective, two-stage sequential implementation framework.

Phase 1 (Single-Arm Exploratory Pilot Stage):

Objective: To establish preliminary safety, tolerability, gut microbiota remodeling, and reproductive feasibility of oral FMT in PMOS patients undergoing FET.

Cohort: An initial exploratory cohort of 11 evaluable overweight or obese patients with PMOS (BMI≥24.0kg/m2) scheduled for Frozen-Thawed Embryo Transfer (FET).

Design: Prospective, open-label, single-arm pilot study without a concurrent control group.

Phase 2 (Randomized Controlled Trial Stage):

Objective: To rigorously confirm therapeutic efficacy, metabolic amelioration, and pregnancy rate enhancement in a larger sample size based on Phase 1 safety and biomarker findings.

Design: Prospective, randomized controlled trial comparing oral FMT capsule intervention with standard care/placebo control.

Intervention Protocol:Participants in the FMT intervention receive oral FMT freeze-dried powder capsules derived from strictly screened, traceable healthy donors provided by a standardized Microbiota Biobank.

Dosage: 5 capsules twice daily, taken orally on an empty stomach for 6 consecutive days per course.

Schedule: Three identical courses separated by a 4-week interval. Background Care: Standardized lifestyle and dietary guidance are maintained throughout both phases.

Study Endpoints:

Primary Endpoints:Reproductive and pregnancy outcomes following FET (biochemical pregnancy rate, clinical pregnancy rate, embryo implantation rate).Safety and tolerability (incidence, severity, and causality of Adverse Events).

Secondary Endpoints:

Endocrine profiles (LH, FSH, Total Testosterone, Free Testosterone, PRL, Progesterone, Estradiol).

Metabolic and glycemic parameters (BMI, fasting blood glucose, HbA1c, fasting insulin, HOMA-IR, lipid profiles).

Systemic inflammatory and gut barrier markers (CRP, TNF-α, IL-6, IL-22, LPS). Gut microbiota structure and diversity via metagenomic sequencing and bile acid metabolomics.

Being tested
oral Fecal Microbiota Transplantation, Placebo
Keywords
FMT, PCOS, PMOS
Medical subject headings
Polycystic Ovary Syndrome

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • oral Fecal Microbiota TransplantationBiological

    Participants will receive standardized oral FMT freeze-dried powder capsules without antibiotic pretreatment. The capsules are derived from strictly screened, traceable healthy donors from a standardized Microbiota Biobank.

    Dosage and Regimen: Oral administration of 5 capsules twice daily on an empty stomach for 6 consecutive days, which constitutes one course. The complete regimen consists of 3 identical courses administered at Week 0, Week 4, and Week 8.

    Background: Standardized lifestyle and dietary guidance will be provided throughout the study.

  • PlaceboOther

    Participants will receive visually and olfactory-matched placebo capsules without antibiotic pretreatment.

    Dosage and Regimen:Oral administration of 5 capsules twice daily on an empty stomach for 6 consecutive days per course. The complete regimen consists of 3 identical courses administered at Week 0, Week 4, and Week 8, exactly mirroring the experimental arm.

    Background: Standardized lifestyle and dietary guidance will be provided throughout the study.

Study groups in NCT07746635
Study groupRoleWhat they receive
Oral FMT Capsules GroupExperimentalParticipants in this experimental arm are overweight and obese patients with Polyendocrine Metabolic Ovarian Syndrome (PMOS) scheduled for Frozen-Thawed Embryo Transfer (FET). They will receive standardized oral fecal microbiota transplantation (FMT) capsules without antibiotic pretreatment. Standardized lifestyle and dietary guidance will be provided throughout the study.
Receives: Biological: oral Fecal Microbiota Transplantation
Placebo Capsules GroupPlacebo comparatorParticipants in this comparing arm are overweight and obese patients with Polyendocrine Metabolic Ovarian Syndrome (PMOS) scheduled for Frozen-Thawed Embryo Transfer (FET). They will receive visually and olfactory-matched placebo capsules without antibiotic pretreatment. Standardized lifestyle and dietary guidance will be provided throughout the study.
Receives: Other: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Clinical Pregnancy Rate

    The percentage of participants who achieve a confirmed clinical pregnancy, defined as the presence of at least one intrauterine gestational sac with a viable fetal heartbeat confirmed by transvaginal ultrasound.

    Measured: Assessed up to 8 weeks following the Frozen-Thawed Embryo Transfer (FET)(approximately within 6 months following the completion of the FMT intervention).

  2. Biochemical Pregnancy Rate

    The percentage of participants who achieve a biochemical pregnancy, confirmed by a serum beta-hCG level > 10 mIU/mL.

    Measured: Assessed at 14 days following the Frozen-Thawed Embryo Transfer (FET)

  3. Incidence of Adverse Events (AEs)

    The number of participants experiencing any treatment-related adverse events or serious adverse events, graded according to the Common Terminology Criteria for Adverse Events (CTCAE v5.0),including diarrhea,bloating,abdominal pain,constipation,etc.

    Measured: Assessed from the first dose of FMT through the 12-week post-treatment follow-up

Secondary outcomes (7)
  1. Change in Body Mass Index (BMI)

    Evaluation of the mean change in Body Mass Index (calculated as weight in kilograms divided by height in meters squared) from baseline to post-treatment.

    Measured: Baseline and 4 weeks post-FMT.

  2. Change in Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)

    Evaluation of the mean change in insulin resistance assessed by the HOMA-IR index (calculated from fasting blood glucose and fasting insulin levels).

    Measured: Baseline, 4 weeks post-FMT, and 12 weeks post-FMT.

  3. Change in Serum Total Testosterone (T) Level

    Evaluation of the mean change in fasting serum total testosterone levels from baseline.

    Measured: Baseline, 4 weeks post-FMT, and 12 weeks post-FMT.

  4. Change in Serum Luteinizing Hormone (LH) Level

    Evaluation of the mean change in fasting serum luteinizing hormone levels from baseline.

    Measured: Baseline, 4 weeks post-FMT, and 12 weeks post-FMT.

  5. Change in Serum Interleukin-6 (IL-6) Level

    Evaluation of the mean change in systemic inflammatory marker Interleukin-6 (IL-6) from baseline.

    Measured: Baseline, 4 weeks post-FMT, and 12 weeks post-FMT.

  6. Change in Gut Microbiota Alpha Diversity (Shannon Index)

    Evaluation of the change in gut microbial alpha diversity from baseline, primarily assessed using the Shannon Diversity Index derived from metagenomic or 16S rRNA sequencing of fecal samples.

    Measured: Baseline and 4 weeks post-FMT.

  7. Live Birth Rate (LBR)

    The percentage of participants who deliver at least one live-born infant after 24 weeks of gestation.

    Measured: Assesssed up to 42 weeks following the Frozen-Thawed Embryo Transfer (FET)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted5 Aug 2026
  2. Study start15 Apr 2025
  3. Primary completion31 Dec 2028 (estimated)
  4. Study completion31 Dec 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Phase 1: Single Group Assignment Phase 2: Parallel Assignment
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
201 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07746635
Sponsor's protocol ID
2025SL038
Acronym
FMT-PMOS
Status last verified
Sep 2026
First submitted
25 Jul 2026
Last updated
22 Sep 2026
Results posted
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing oral Fecal Microbiota Transplantation in people with PCOS (Polycystic Ovary Syndrome), run by Shanghai Changzheng Hospital at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 22 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Ningxia Sun, Chief (13817975897, suesunchzh@126.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Clinical Pregnancy Rate (time frame: Assessed up to 8 weeks following the Frozen-Thawed Embryo Transfer (FET)(approximately within 6 months following the completion of the FMT intervention).). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Sep 2026.

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