Evaluating hormonal treatment for adolescents with gender dysphoria

Evaluation of the Effectiveness of Hormonal Treatment in Adolescents Suffering from Gender Dysphoria

Phase 3 Interventional Assistance Publique - Hôpitaux de Paris · NCT06351501

This study tests if giving cross-sex hormones to teens with gender dysphoria who have started their social transition helps them feel better and function well compared to those who don’t receive the hormones.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment60 (estimated)
Ages162 Months to 174 Months
SexAll
SponsorAssistance Publique - Hôpitaux de Paris Academic / other
Locations4 sites (Paris, Paris and 3 other locations)
Trial IDNCT06351501 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the effectiveness of hormonal treatment in adolescents diagnosed with gender dysphoria, focusing on those who have completed their social transition. The study is a multicenter, controlled, randomized trial that includes a blinded evaluation of outcomes. Adolescents aged 14 years will be randomized to receive either cross-sex hormones (testosterone or estrogen) or a control treatment, with assessments conducted at ages 16 and 18 to evaluate overall functioning and psychosocial outcomes. The trial aims to provide evidence on the benefits of early hormonal intervention compared to later treatment.

Who should consider this trial

Good fit: Ideal candidates for this study are adolescents aged 14 years who have been diagnosed with gender dysphoria and have initiated puberty.

Not a fit: Patients who do not meet the inclusion criteria, such as those with contraindications to hormonal treatment or those not diagnosed with gender dysphoria, may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide critical evidence supporting early hormonal treatment for adolescents with gender dysphoria, potentially improving their mental health and overall quality of life.

How similar studies have performed: While there is a growing body of literature on hormonal treatments for gender dysphoria, this specific approach of early intervention at age 14 is novel and has not been extensively tested in prior studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adolescents aged 14+/- 6 months,
* Having initiated puberty: tanner score ≥2 for FtM; tanner score ≥2 (clinic and/or testosterone \>0.3 ng/mL) for MtF
* Presenting the criteria for gender dysphoria according to the DSM5 assessed by at least two child psychiatric interviews at least six months apart where the diagnosis of gender dysphoria was clinically established and that of associated autism spectrum disorder refuted and/or associated cognitive impairment, confirmed by specific scales (Gender Identity / Gender Dysphoria Questionnaire for Adults and Adolescents (GIDYQ-AA) and Utrecht Gender Dysphoria Scale (UGDS))
* Whose indication for hormonal transition has been validated in a multidisciplinary consultation meeting after at least one consultation with the pediatric endocrinologist with clinical examination, blood pressure measurement, and information on hormonal treatments in the context of gender dysphoria.

Exclusion Criteria:

* Contraindication to hormonal treatment (see paragraph 1.5)
* Hormonal treatment needs to be adjusted (FtM patients treated with anti-coagulants or with thrombophilia).
* Patients with risk of aggravation of certain diseases under oestrogen treatment (MtF patients with uncontrolled diabetes with HBA1C \> 8%, patients with cholelithiasis, biliary lithiasis, systemic lupus erythematosus, severe asthma, severe arterial hypertension, severe migraines, otosclerosis, epilepsy not controlled by treatment).
* Patients with cancer with a risk of hypercalcemia (and associated hypercalciuria), linked to bone metastases.
* Severe cardiac, hepatic or renal failure or ischemic heart disease, due to the risk of severe complications characterized by edema, with or without congestive heart failure.
* Uncontrolled high blood pressure.
* Patients with epilepsy and migraine.
* Patients with current or history of thromboembolic events.
* Severe untreated chronic depression
* Current anticoagulant treatment
* Severe autism Spectrum Disorder (clinical screening, confirmed in cases of doubt by the Social Responsiveness Scale (SRS) Raw-score \> 76, carried out as part of usual care in cases of clinical evidence,
* Cognitive deficit (clinical screening, confirmed by an QI \< 80 on the Weschler scale (WISC V), carried out as part of the usual treatment in the event of clinical evidence.
* Refusal to participate in the study on the part of the adolescent or one of the holders of parental authority (both holders and the adolescent must sign a written consent after receiving appropriate information).
* No social security cover
* Participation in other intervention research
* Pregnancy in progress
* Insufficient knowledge of French

Where this trial is running

Paris, Paris and 3 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Gender Dysphoriaadolescentshormonal treatmentmental health
Last reviewed 2026-06-13 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.