1. Bone Development in Transgender Adolescents Treated With GnRH Analogues and Subsequent Gender-Affirming Hormones.
- Author
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Schagen SEE, Wouters FM, Cohen-Kettenis PT, Gooren LJ, and Hannema SE
- Subjects
- Adolescent, Adolescent Development drug effects, Adolescent Development physiology, Bone Density drug effects, Bone Development physiology, Child, Female, Gender Dysphoria physiopathology, Gonadotropin-Releasing Hormone pharmacology, Gonadotropin-Releasing Hormone therapeutic use, Humans, Male, Netherlands, Prospective Studies, Gender-Affirming Procedures, Sexual Maturation drug effects, Testosterone pharmacology, Testosterone therapeutic use, Transsexualism physiopathology, Triptorelin Pamoate pharmacology, Triptorelin Pamoate therapeutic use, Bone Development drug effects, Gender Dysphoria drug therapy, Gonadotropin-Releasing Hormone analogs & derivatives, Hormone Replacement Therapy methods, Transsexualism drug therapy
- Abstract
Context: Hormonal interventions in adolescents with gender dysphoria may have adverse effects, such as reduced bone mineral accrual., Objective: To describe bone mass development in adolescents with gender dysphoria treated with gonadotropin-releasing hormone analogues (GnRHa), subsequently combined with gender-affirming hormones., Design: Observational prospective study., Subjects: 51 transgirls and 70 transboys receiving GnRHa and 36 transgirls and 42 transboys receiving GnRHa and gender-affirming hormones, subdivided into early- and late-pubertal groups., Main Outcome Measures: Bone mineral apparent density (BMAD), age- and sex-specific BMAD z-scores, and serum bone markers., Results: At the start of GnRHa treatment, mean areal bone mineral density (aBMD) and BMAD values were within the normal range in all groups. In transgirls, the mean z-scores were well below the population mean. During 2 years of GnRHa treatment, BMAD stabilized or showed a small decrease, whereas z-scores decreased in all groups. During 3 years of combined administration of GnRHa and gender-affirming hormones, a significant increase of BMAD was found. Z-scores normalized in transboys but remained below zero in transgirls. In transgirls and early pubertal transboys, all bone markers decreased during GnRHa treatment., Conclusions: BMAD z-scores decreased during GnRHa treatment and increased during gender-affirming hormone treatment. Transboys had normal z-scores at baseline and at the end of the study. However, transgirls had relatively low z-scores, both at baseline and after 3 years of estrogen treatment. It is currently unclear whether this results in adverse outcomes, such as increased fracture risk, in transgirls as they grow older., (© Endocrine Society 2020.)
- Published
- 2020
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