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Hormones may shape how we feel pain, new study suggests

NCT ID NCT05787470

Knowledge-focused Sponsor: University of Alabama at Birmingham Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jul 02, 2026 · Updated 2 times

Summary

This study looks at how hormones like testosterone and estradiol influence pain sensitivity in cisgender and transgender individuals. Researchers will test pain responses to heat, cold, and pressure, and analyze blood samples for hormone levels and immune markers. The goal is to understand biological factors behind pain differences, which could lead to better pain treatments in the future.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this study could reveal how hormones influence pain perception, potentially guiding personalized pain management approaches.
What could go wrong
This is an observational study with no treatment, so it won't directly change medical practice. Results may not apply to all populations.

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.

Participants

About 120 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2023

Expected to finish

Jul 2027

An estimate. End dates often move.

Lead sponsor

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.

Who is studied

Study population will be chosen from the general public within the Birmingham as well as participants recruited through the Birmingham Aids Outreach (BAO), Magic City Acceptance Center (MCAC) and the Transgender Advocates Knowledgeable Empowering (TAKE).

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * self-identification as one of the above gender identities * understanding of verbal and written English. * participants that have been on/off hormone treatment for at least 6 months Exclusion Criteria: * pain in at least 3/7 days/week for the past 3 months * HIV positive diagnosis * cardiovascular or pulmonary disease * regular use of opioid pain medications * uncontrolled hypertension (i.e. SBP/DBP of \> 150/95) * current illness accompanied by fever (body temperature \>38 °C) * prostatectomy, hysterectomy or oophorectomy * hospitalization due to psychiatric illness within the last 6 months.

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Conditions

The condition(s) this trial relates to.

Pain

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Gender identity Pain

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • University of Alabama at Birmingham

    RECRUITING

    Birmingham, Alabama, 35294, United States

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