Quantitative effects of sex hormones on hair growth and patient satisfaction
Authors' conclusion
GAHT induces measurable, location-specific changes in terminal hair growth in transgender women and men, accompanied by improvements in body image and satisfaction.
Study context
- Population
- Transgender men and women initiating gender-affirming hormone therapy (GAHT), assessed at baseline, 3 and 12 months
- Participants
- 36 men
- Exposure
- Transgender women vs Transgender men
- Transgender womenn = 16
- Transgender menn = 20
- Outcome
- Change in terminal hair density measured by digital microscopy
- Follow-up
- 12 months
Main finding
As reported in the abstract
Change in terminal hair density (digital microscopy)
- Transgender women: upper lip
- −17 hairs/cm², CI −32, −2
- Transgender women: chin
- −28 hairs/cm², CI −47, −8
- Transgender men: upper lip
- +21 hairs/cm², CI 11-30
- Transgender men: chin
- +13 hairs/cm², CI 3-24
- Transgender men: upper abdomen
- +17 hairs/cm², CI 8-23
- Transgender men: lower abdomen
- +20 hairs/cm², CI 11-28
- Transgender men: thighs
- +14 hairs/cm², CI 7-21
Observational data: associations, not effects.
Further findings
Psychosocial outcomes (Body Appreciation Scale-2, satisfaction questionnaires)
- Both groups reported improved body appreciation, satisfaction with hair growth and gender congruence
Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.
Original publication
Quantitative effects of sex hormones on hair growth and patient satisfaction. J Clin Endocrinol Metab. Published 8 April 2026. doi:10.
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