Some people want to delay puberty from starting. This option is available to youth who have not yet started puberty or who have just started puberty. The medicine to block puberty is called a GnRH agonist. It stops the body from making the hormones that start puberty. Puberty delay is temporary. If you stop taking the medicine, you will go through the puberty of the sex you were born into. We work with you and your family to decide if this is a good choice for you. We also talk about the cost and the best time to start.