Puberty blockers are drugs that cause a temporary pause in some one's puberty by blocking sex hormons like test ostron or estrogen. Puberty suppressence are also reversible, which means that when you stop taking them, the puberty will re start and continue at a normal rate. Hormontherapy is really, it's different for every person. There are indications that hormon therapy may have an effect on long term fertility, especially if it's started at a very young age.