Could a common supplement boost antibiotic success for a hidden cause of infertility?
NCT ID NCT07180563
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This study tests whether adding berberine (a natural compound) to the standard antibiotic doxycycline works better than doxycycline alone for chronic endometritis, an inflammation of the uterine lining that can cause infertility. About 206 women with the condition will take either the combination or the antibiotic alone for 14 days. The main goal is to see if the infection clears more often with the combination, and to track polyp recurrence.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- berberine and doxycycline
- What this could lead to
- If it works, this could offer a more effective treatment for chronic endometritis, potentially improving fertility outcomes and reducing uterine polyp recurrence.
- What could go wrong
- This is an early Phase 1/2 trial with only 206 participants, so results may not apply to everyone. Side effects like nausea, rash, or drug fever are possible, and the combination may not be more effective than doxycycline alone.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1/2
Runs two stages together: safety and dose first, then whether the treatment works.
- Participants
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About 206 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Mar 2025
- Expected to finish
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Dec 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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20 years and older
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Diagnosis of chronic endometritis by CD138 immunohistochemistry; Age≥ 20 years old, females of childbearing age; Agree to undergo hysteroscopy and hysteroscopic endometrial biopsy; No serious systemic disease; There are no contraindications to oral administration of doxycycline hydrochloride and berberine hydrochloride. Exclusion Criteria: Patients with pregnancy status, uterine malignant disease, hormone therapy within 3 months, glucose-6 phosphate dehydrogenase deficiency, hemolytic anemia, hypersensitivity to berberine hydrochloride or doxycycline. In addition, berberine hydrochloride has fewer oral adverse reactions, occasional nausea and vomiting, rash and drug fever, which disappear after stopping the drug. If the patient takes the wrong or missed medication, it is excluded.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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The Fourth Affiliated Hospital of Zhejiang University School of Medicine
RECRUITINGYiwu, Zhejiang, 322000, China
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- A simple look inside the uterus may reveal hidden inflammation — no lab needed
- Hormone pretreatment may boost IVF success in stubborn uterine infection
- Uterine infection linked to infertility: antibiotics may boost pregnancy chances
- Hope for women with recurrent pregnancy failure: new drug combo trial
- Herbal-Antibiotic combo aims to beat stubborn womb infection