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Hormone-Brain link explored in new study

NCT ID NCT07212712

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how the hormones estrogen and testosterone control blood flow to the brain. Researchers will temporarily block these hormones in 50 healthy young men and women, then measure brain blood flow and energy use. The goal is to understand sex differences in brain health and improve treatments for conditions like stroke and dementia.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 50 people

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

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

Dec 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.

Ages

18 to 40 weeks

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: The investigators will recruit healthy young (18-40 years) males (n = 25) and females (n = 25). Females must be naturally cycling (i.e., no oral or hormonal contraceptives), not pregnant, and premenopausal. Participants must be normotensive (\<140/90 mmHg \& \>90/60 mmHg) and have no medical history of cerebrovascular, cardiopulmonary, cardiovascular, neuromuscular, and renal disease assessed by a study questionnaire. A recent physical examination (within 1 year of participation) from a family physician or a completed physical examination by the study doctor is required prior to participation. All subjects will sign an informed consent form prior to participation. Participants will be excluded if they meet any of the following criteria: * Hypertensive (≥140/90 mmHg) or hypotensive (≤90/60 mmHg) * BMI ≥ 30 kg/m2 * Fasting blood glucose ≥ 100 mg/dL * Abnormal results on standard blood hematology tests (e.g., complete blood count, comprehensive metabolic panel) * Males with hypogonadism (total testosterone ≤ 262 ng/dL, per Endocrine Society recommendations) * Any history of cerebrovascular, cardiopulmonary, cardiovascular, neuromuscular, or renal disease * Any liver dysfunction or disease * Taking any cardiovascular medications or medications that would interfere with study medications (e.g., strong organic anion transporting polypeptide 1B1 inhibitors) * Contraindications or sensitivities to study medications * Current eating disorder (defined as \>2 on the 'SCOFF' questionnaire 67) * Current smokers * Females with an irregular menstrual cycle or any medical conditions affecting the menstrual cycle (normal cycle defined as 21-35 days from menstrual cycle diary) * Females who are pregnant (assessed with pregnancy test at screening and prior to starting medications), breastfeeding, or planning to conceive within 3 months * Females using hormonal birth control (Copper intrauterine devices \[IUDs\] will be allowed as they do not change systemic hormone levels) * Females who are peri- or postmenopausal (as determined by STRAW criteria 68) * History of hormone-sensitive cancers (i.e., breast, ovarian, uterine or prostate) * Z-score \< -2 as assessed with DXA scan (to determine risk of decrease in bone mineral density) * Assessed using the Center for Epidemiologic Studies Depression (CES-D) scale, participants with a score \> 16 at screening unless otherwise approved by the study MD

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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.

  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 British Columbia - Okanagan

    Kelowna, British Columbia, V1V 1V7, Canada

More trials for these conditions

Other studies related to the condition(s) this trial covers.