Semaglutide, Weight Loss, and LNG-IUD for Conservative Treatment of Endometrial Atypical Hyperplasia and Grade 1 Endometrial Cancer (SWIFT)

September 9, 2026 updated by: Aparna A. Kamat, The Methodist Hospital Research Institute

SEMAGLUTIDE, WEIGHT LOSS, AND INTRAUTERINE THERAPY FOR FERTILITY-SPARING AND CONSERVATIVE TREATMENT FOR ENDOMETRIAL ATYPICAL HYPERPLASIA AND EARLY-STAGE, GRADE 1 ENDOMETRIOID ENDOMETRIAL CANCER

The goal of this clinical trial is to learn if a combination treatment of a hormonal intrauterine device (LNG-IUD), semaglutide, and a structured weight loss program can treat endometrial atypical hyperplasia or grade 1 endometrioid endometrial cancer while preserving fertility in women of reproductive age with endometrial atypical hyperplasia (EAH) or FIGO grade 1 endometrioid endometrial cancer who wish to preserve their fertility. The main questions it aims to answer are:

  • What proportion of participants achieve a complete pathological response after treatment?
  • How durable is the response at 12 months?
  • What effect does the treatment have on metabolic outcomes (weight, BMI, HbA1c) and quality of life?

Participants will:

  • Receive an LNG-IUD
  • Receive semaglutide 2.4mg
  • Participate in a structured weight loss program
  • Undergo hysteroscopy with endometrial sampling to assess treatment response
  • Complete quality-of-life assessments at baseline, 6 months, and 12 months

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

48

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Texas
      • Houston, Texas, United States, 77030
      • Houston, Texas, United States, 77030
      • Houston, Texas, United States, 77030
      • Houston, Texas, United States, 77030

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Histological Diagnosis: Histologically confirmed endometrial atypical hyperplasia or FIGO grade 1 endometrioid Endometrial Cancer

  2. Imaging eligibility (for patients with endometrial cancer):

    1. Depth of myometrial invasion <50% confirmed by MRI or disease limited to the endometrium
    2. No evidence of extrauterine or metastatic disease on imaging.

  3. Treatment Rationale (at least one of the following must apply):

    1. Desire for future fertility: Patient expresses a documented desire to preserve the uterus and future reproductive function, with explicit acknowledgment that fertility-sparing treatment is not standard of care for endometrial cancer.
    2. Medical inoperability: patients are considered a poor surgical candidate due to:

    i. Class III obesity (BMI ≥40 kg/m²); or ii. ASA Physical Status Classification score ≥3.

  4. Metabolic Profile: BMI ≥ 30 kg/m², or BMI 27-29.9 kg/m² with at least one weight-related comorbidity (hypertension, type 2 diabetes mellitus, dyslipidemia, obstructive sleep apnea, or non-alcoholic fatty liver disease).

  5. Progestin washout: patients with prior progestin exposure are eligible provided the following minimum washout periods have been observed.

    1. Oral progestins: 7 days
    2. Injectable, short acting: 14 days
    3. Injectable, long acting: 6 months
    4. Contraceptive implant: 28 days
    5. LNG-IUD: 7 days after removal

Exclusion Criteria:

  1. Age ≥18 years
  2. Negative pregnancy test at screening
  3. Ability to provide written informed consent and comply with study procedures
  4. Willingness to undergo genetic counseling and MMR/IHC tumor profiling
  5. Willingness and ability to participate in a structured weight loss program, including attendance at counseling sessions (in person or virtual) and adherence to dietary and physical activity goals.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Combination Fertility-Sparing Treatment
Participants will receive a three-component combination intervention consisting of: (1) a levonorgestrel-releasing intrauterine device (LNG-IUD), inserted at baseline; (2) semaglutide 2.4 mg, administered per standard dosing schedule; and (3) a structured weight loss program. Participants will undergo hysteroscopy with endometrial sampling to assess pathological response. Treatment will be administered for 6 months of active intervention, followed by a 6-month follow-up period.
Drug: Semaglutide (Wegovy) weekly injection
Semaglutide 2.4 mg administered subcutaneously once weekly, following standard dose-escalation protocol, for the duration of the 6-month active treatment period. Used off-label in this trial for its metabolic effects in combination with LNG-IUD, rather than as monotherapy for weight loss.
Device: LNG-IUD (Progestin)
Levonorgestrel-releasing intrauterine device inserted at study baseline and maintained through the active treatment and follow-up periods, providing continuous local progestin delivery to the endometrium in combination with systemic semaglutide.
Behavioral: Structured Weight Loss Program
A structured, protocol-defined weight loss program combining dietary counseling and physical activity guidance, delivered concurrently with pharmacologic and device-based treatment to support metabolic response, distinct from weight loss achieved through semaglutide alone.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Pathological Response Rate
Time Frame: 6 months
Pathological Response Rate (PRR) defined as the rate of regression of atypical hyperplasia or carcinoma on histopathological examination of the 6-month (end-of-treatment) hysteroscopic sample
6 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Time to response
Time Frame: 12 months
Time to response in months from treatment initiation to first documented histopathological regression
12 months
Adverse events
Time Frame: 12 months
Incidence and severity of adverse events, graded per NCI-CTCAE v5.0, including drug-related (semaglutide) and device-related (LNG-IUD) events
12 months
Durable response rate
Time Frame: 12 months
The proportion of participants who achieve a complete pathological response and maintain that response, without evidence of disease recurrence or progression, through 12 months following treatment initiation. Durable response will be assessed via hysteroscopy with endometrial sampling.
12 months
Disease progression rate
Time Frame: 12 months
The proportion of participants who experience disease progression, defined as an increase in histologic grade or stage of endometrial atypical hyperplasia or endometrial cancer, without ever achieving a complete pathological response, assessed through 12 months from treatment initiation. Disease status will be assessed via hysteroscopy with endometrial sampling.
12 months
Recurrence rate
Time Frame: 12 months
The proportion of participants who experience recurrence of endometrial atypical hyperplasia or endometrial cancer following an initial complete pathological response, assessed through 12 months from treatment initiation. Disease status will be assessed via hysteroscopy with endometrial sampling.
12 months

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Body weight change
Time Frame: 12 months
Change in body weight, measured in kilograms, from baseline to 6 and 12 months following treatment initiation.
12 months
Body mass index (BMI) change
Time Frame: 12 months
Change in body mass index (BMI), calculated as weight in kilograms divided by height in meters squared, from baseline to 6 and 12 months following treatment initiation.
12 months
Waist circumference change
Time Frame: 12 months
Change in waist circumference, measured in centimeters, from baseline to 6 and 12 months following treatment initiation.
12 months
Hip circumference change
Time Frame: 12 months
Change in hip circumference, measured in centimeters, from baseline to 6 and 12 months following treatment initiation.
12 months
Waist-to-hip ratio change
Time Frame: 12 months
Change in waist-to-hip ratio, calculated as waist circumference divided by hip circumference, from baseline to 6 and 12 months following treatment initiation.
12 months
Glycated Hemoglobin change
Time Frame: 12 months
Change in glycated hemoglobin (HbA1c), measured as a percentage, from baseline to 6 and 12 months following treatment initiation.
12 months
Weight-Related Quality of Life (WRQOL)
Time Frame: 12 months
Change in weight-related quality of life, assessed using a validated WRQOL questionnaire, from baseline to 6 and 12 months following treatment initiation.
12 months
Health-Related Quality of Life (HRQOL)
Time Frame: 12 months
Change in health-related quality of life, assessed using a validated HRQOL questionnaire, from baseline to 6 and 12 months following treatment initiation.
12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The Methodist Hospital Research Institute

Investigators

  • Principal Investigator: Aparna A. Kamat, MD, The Methodist Hospital Research Institute

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

January 1, 2027

Primary Completion (Estimated)

December 31, 2028

Study Completion (Estimated)

December 31, 2031

Study Registration Dates

First Submitted

September 9, 2026

First Submitted That Met QC Criteria

September 9, 2026

First Posted (Actual)

September 15, 2026

Study Record Updates

Last Update Posted (Actual)

September 15, 2026

Last Update Submitted That Met QC Criteria

September 9, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • PRO00043004

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

De-identified individual participant data, including the study protocol and statistical analysis plan, will be made available to researchers who provide a methodologically sound proposal, beginning 12 months after publication of the primary results and ending 36 months after publication. Data will be shared for the purpose of achieving the aims outlined in the approved proposal, following execution of a data access agreement.

IPD Sharing Time Frame

Data will become available beginning 12 months after publication of the primary study results and will remain available for 36 months thereafter.

IPD Sharing Access Criteria

De-identified individual participant data, including the study protocol, statistical analysis plan, and informed consent form, will be available to researchers who provide a scientifically sound proposal for data use. Requests should be directed to the principal investigator. Proposals will be reviewed to confirm that the intended use is consistent with the original trial objectives and applicable data protection regulations. Approved requesters will be required to sign a data access agreement prior to receiving data. Access will be granted for the purpose of achieving the aims outlined in the approved proposal.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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