Some young people want to delay or stop puberty. If puberty has just started, they may take a medication called a GnRH agonist. It is given as an injection (every 1-3 months) or as an implant under the skin (which lasts 1-2 years). The medicine stops puberty from progressing but is completely reversible. You will continue to grow but sex-specific changes of puberty will not occur (for example, breast development, facial hair, voice dropping). The medication is usually not recommended to be used for more than a few years. After that time, we recommend either allowing puberty to progress according to your sex assigned at birth or starting cross-sex hormones.