Clinical trial Recruiting at 1 site Interventional Ages 22 to 45 Women only

Wearable brain stimulation device for managing endometriosis pain

Official title: At-Home Transcranial Direct Current Stimulation (tDCS) Using the NettleEndo Device for Reducing Symptoms of Endometriosis - A Pivotal Double-Blind, Randomized, Placebo-Controlled Clinical Trial

Run by Samphire Group, Inc. · NCT06974773 · Data updated 2026-11-12

This study tests if a wearable brain stimulation device can help women with endometriosis feel less pain and improve their overall wellbeing.

Quick facts

Study typeInterventional
Ages22 Years to 45 Years
SexWomen only
Enrollment120 (estimated)
SponsorSamphire Group, Inc.
Industry-sponsored
Locations1 site (San Francisco, California)
StatusRecruiting
StartedDecember 4, 2025
Main results expectedJuly 1, 2026
Study endsAugust 1, 2026
Registry record updatedDecember 18, 2025
Trial IDNCT06974773 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are women aged 22-45 with a confirmed diagnosis of endometriosis and experiencing significant pelvic pain.

Probably not a fit

Patients who are pregnant, breastfeeding, or have a history of severe neurological conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the effectiveness of a wearable brain stimulation device called NettleEndo in reducing chronic pelvic pain and improving overall wellbeing in women with endometriosis. Participants will use the device at home for 20 minutes per session, five times a week over 12 weeks, while being randomly assigned to receive either active or sham stimulation. The study aims to assess pain intensity, mood, sleep quality, and quality of life through self-reported measures collected via a mobile app. The trial is designed as a randomized, double-blind, sham-controlled study to ensure unbiased results.

Why it matters

Potential benefit: If successful, this intervention could significantly alleviate chronic pelvic pain and enhance the quality of life for women suffering from endometriosis.

How similar studies have gone: While the approach of using transcranial direct current stimulation is gaining interest, this specific application for endometriosis is relatively novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria

* Female, 22-45 years old
* Assigned female at birth
* Fluent in English
* Capacity to consent
* Confirmed diagnosis of endometriosis by a qualified physician, via:
* Laparoscopic surgery with biopsy-proven endometriosis, OR
* Clear evidence of ovarian endometrioma or deep infiltrating endometriosis on ultrasound/MRI
* Pain levels:

For menstruating participants, all of the following need to be met:

* Regular menstrual cycles (21-35 days)
* Mean DYS NRS ≥4 during menstrual bleeding days (over the last 28 days, self-assessed)
* AND Mean NMPP NRS ≥4 during non-menstrual days (over the last 28 days, self-assessed)

For non-menstruating patients, all required:

* Irregular/absent cycles OR post-hysterectomy OR surgically menopausal
* Mean pelvic pain NRS ≥4 (over the last 28 days, self-assessed)
* Pain present on ≥50% of days
* Access to a smartphone with an internet data plan, phone must be iOS 13.4+, or Android 12+.
* No hormonal contraception or at least 6 months of consistent adherence to any hormonal contraception (e.g., IUD, pill, injection).
* Capacity to follow instructions and operate the study device.

Exclusion Criteria

* Pregnancy/breastfeeding or planning to become pregnant in next 6 months
* History of epileptic neurological conditions in the immediate family
* Severe/untreated neurological disease (e.g., epilepsy or seizure disorders, stroke or transient ischemic attack \[TIA\], subarachnoid hemorrhage, traumatic brain injury \[TBI\] with persistent neurological deficits, brain tumors \[malignant or benign\], multiple sclerosis, Parkinson's disease, Alzheimer's disease or other dementias, Huntington's disease, cerebral aneurysms or arteriovenous malformations \[AVMs\], active central nervous system infections \[e.g., meningitis, encephalitis\], hydrocephalus, other neurodegenerative diseases not otherwise specified, or any other neurological condition that, in the opinion of the principal investigator, may increase risk or interfere with study participation or outcomes)
* Metal implants/electronic devices in brain, head, or neck area
* Participating in any other clinical trial
* History of stroke, brain surgery, tumors, head trauma
* Active skin lesions, open wounds, cuts, or infections on the scalp
* Active scalp conditions (dermatitis, eczema, psoriasis)
* Significant scarring/burns/other skin damage on scalp
* Schizophrenia or bipolar disorder
* History of suicidal behavior or clinically significant self-injurious behavior (e.g., one or more suicide attempts, non-suicidal self-injury \[NSSI\], or other behaviors indicative of intent to harm oneself), as determined by participant self-report.
* Treatment plan must be stabilized (≥6 weeks analgesic/ ≥6 months hormonal contraception, and crucially no new medication changes before randomization)
* Planning to commence any new treatment during intervention period
* Lack of capacity to consent
* Participation in a neurotechnology or drug trial in the last 6 months.
* Recent surgical intervention for endometriosis within 6 months of enrollment or planned surgical intervention for endometriosis during the study period.

Where it's running

  • Alethios, Inc.
    San Francisco, California, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.