Clinical trial Recruiting at 1 site Observational Ages 13 to 16

Effects of Estradiol on Cardiometabolic Health in Transgender Youth

Official title: Pubertal Blockade and Estradiol Effects on Cardiometabolic Health for Transitioning Youth

Run by University of Colorado, Denver · NCT04596592 · Data updated 2026-11-12

This study tests how estradiol affects insulin sensitivity and blood vessel health in transgender girls aged 13-16 compared to girls who are not transgender.

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Quick facts

Study typeObservational
Ages13 Years to 16 Years
SexAll
Enrollment90 (estimated)
SponsorUniversity of Colorado, Denver
Academic / other
Locations1 site (Aurora, Colorado)
StatusRecruiting
StartedFebruary 15, 2021
Main results expectedJuly 31, 2026
Study endsJuly 31, 2026
Registry record updatedJune 10, 2025
Trial IDNCT04596592 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include transgender females aged 13-16 who are planning to start estradiol therapy within four months and have been on a gonadotropin releasing hormone analogue for over six months.

Probably not a fit

Patients with cognitive, psychiatric, or physical impairments, or those with certain medical conditions such as diabetes or hypertension, 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 observational study evaluates how estradiol, with or without prior treatment using a gonadotropin releasing hormone analogue, impacts insulin sensitivity and vascular function in transgender females aged 13-16. The study compares these effects to those observed in cisgender controls of the same age group. By analyzing these health parameters, the research aims to provide insights into the cardiometabolic health of transitioning youth.

Why it matters

Potential benefit: If successful, this study could improve understanding of the cardiometabolic health risks and benefits associated with hormone therapy in transgender youth.

How similar studies have gone: While there is ongoing research in this area, this specific approach to evaluating cardiometabolic health in transitioning youth is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria (transgender females):

* Identify as a transgender female
* Age 13-16 years at the time of enrollment
* If on a gonadotropin releasing hormone analogue, \> 6 months exposure
* Plan to start estradiol clinically in \< 4 months

Inclusion Criteria (cisgender males and females):

* Males and females ages 13-16 years

Exclusion Criteria:

* Cognitive, psychiatric, or physical impairment resulting in inability to tolerate the study procedures
* Antipsychotic medication use
* Type 1 or 2 diabetes (by medical history)
* Polycystic ovarian syndrome (PCOS for cisgender females)
* Hypertension (resting BP ≥ 140/90 mm/Hg)
* Weight\> 400 lbs
* On oral progesterone medications (including oral progesterone or progestin, combined oral contraceptives or etonogestrel implant)
* Pregnancy (for cisgender females)

Where it's running

  • Children's Hospital Colorado
    Aurora, Colorado, 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.