Brain health changes after gender-affirming hormone therapy in transgender adults
Official title: Cerebral Blood Flow and Neurocognitive Performance in Adults Undergoing Gender-affirming Hormone Therapy
Run by University of Wisconsin, Madison · NCT07624747 · Data updated 2026-11-12
This study tests how starting gender-affirming hormone therapy may affect brain blood flow, structure, connectivity, and cognitive function in transgender adults.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years to 45 Years |
| Sex | All |
| Enrollment | 72 (estimated) |
| Sponsor | University of Wisconsin, Madison Academic / other |
| Locations | 1 site (Madison, Wisconsin) |
| Status | Recruiting |
| Started | October 14, 2025 |
| Main results expected | April 2028 |
| Study ends | April 2028 |
| Registry record updated | June 3, 2026 |
| Trial ID | NCT07624747 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults assigned male or female at birth who plan to begin GAHT and meet health criteria (e.g., no severe cardiovascular or metabolic conditions).
✕Probably not a fit
Individuals who do not start GAHT or who meet exclusion criteria may not experience measurable brain changes related to GAHT.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study examines brain changes in transgender adults before and about 4–6 months after starting GAHT. Researchers will use MRI to measure cerebral blood flow, brain structure, and functional connectivity, along with cognitive tests. The study compares baseline results to a follow-up visit after GAHT initiation to identify potential sex-differentiated effects on neurocognitive function and brain networks. Participants include individuals assigned male or female at birth who are planning GAHT and meet specific health criteria. Optional exercise testing may be added to explore additional brain-health interactions.
Why it matters
Potential benefit: If successful, findings could improve understanding of how GAHT impacts brain health and cognitive functioning.
How similar studies have gone: Prior research suggests GAHT can influence brain structure and function, but this study adds longitudinal, imaging-based data in this specific population.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * intention to undergo GAHT Exclusion Criteria: * BMI greater than 40 kg/m2 * Age greater than 45 yrs * Blood pressure greater than 140/90 (stage II hypertension) * A current diagnosis of type II diabetes * History of traumatic brain injury/concussion, stroke, or seizures * Are post-menopausal * Previously taken hormone therapy medications * Self-reported pregnancy (no pregnancy test)
Where it's running
-
UW School of Medicine and Public Health
Madison, Wisconsin, United States Recruiting
Study contacts
- Principal investigator: William Schrage, PhD — University of Wisconsin, Madison
- Study coordinator: Shawn Bolin, MS
- Email: sbolin@wisc.edu
- Phone: 608-263-6308
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.