Puberty blockers are more than a ‘pause button’: roughly 98% of children who take them go on to take cross-sex hormones.
A 2021 study from the UK  found that only 1 out of 44 children placed on puberty blockers did not continue to take cross-sex hormones.
Similarly, a Dutch study  reported that only 1.9% of adolescents who started puberty suppression treatment abandoned this course and did not take cross-sex hormones.
In fact, in a different Dutch study , “[n]o adolescent withdrew from puberty suppression, and all started cross‐sex hormone treatment, the first step of actual gender reassignment.”
Puberty blockers are drugs which change young bodies in ways we have yet to understand, and may be permanent. This is an experimental treatment program: puberty blockers have never been licensed to treat children with gender dysphoria, in any country.
 Carmichael, P., Butler, G., Masic, U., Cole, T. J., De Stavola, B. L., Davidson, S., Skageberg, E. M., Khadr, S., & Viner, R. M. (2021). Short-term outcomes of pubertal suppression in a selected cohort of 12 to 15 year old young people with persistent gender dysphoria in the UK. PLOS ONE 16 (2). [Link]
 Wiepjes, C.M., Nota, N.M., de Blok, C.J.M., Klaver, M., de Vries, A.L.C., Wensing-Kruger, S.A., de Jongh, R.T., Bouman, M.B., Steensma, T.D., Cohen-Kettenis, P., Gooren, L.J.G., Kreukels, B.P.C. & den Heijer, M. (2018). The Amsterdam Cohort of Gender Dysphoria Study (1972-2015): Trends in Prevalence, Treatment, and Regrets. Journal of Sexual Medicine 15 (4). [Link]
 de Vries, A.L.C., Steensma, T.D., Doreleijers, T.A. & Cohen-Kettenis, P.T. (2011). Puberty suppression in adolescents with gender identity disorder: a prospective follow-up study. J Sex Med 8 (8): 2276-83. [Link]