From the article:

“Hormonal interventions to block the pubertal development of children with gender dysphoria are effective and sufficiently safe to alleviate the stress of gender dysphoria,” said the study’s lead author, Henriette Delemarre-van de Waal, MD, PhD, a professor of pediatric endocrinology at Leiden University Medical Center, Leiden, The Netherlands.

An adolescent who identifies as the opposite sex—now called transgender or gender dysphoric rather than transsexual—often considers the body changes of puberty to be unbearable, Delemarre-van de Waal said.

“Reversible hormone treatment can relieve the psychological suffering of youth with gender dysphoria and allows the adolescent time to explore whether permanent hormone treatment and sex reassignment surgery is the best option,” she said.

Medical intervention in transgender adolescents appears to be safe and effective.