for a transgender youth, while also preventing the physical changes/sports advantages you are concerned about.
WikipediaPuberty blockers, also called puberty inhibitors, are drugs used to postpone puberty in children. The most commonly used puberty blockers are gonadotropin-releasing hormone (GnRH) agonists, which inhibit the release of sex hormones, including testosterone and estrogen. In addition to their various...
https://en.wikipedia.org/wiki/Puberty_blocker