One of the advantages of administering “puberty blockers” to trans youth is that the treatment is “fully reversible,” which makes it a “safe way to mitigate negative health outcomes that can result from undergoing puberty that does not align with a transgender youth’s gender identity,” said Keuroghlian, who’s the director of the national LGBT Health Education Center at The Fenway Institute and director of the Massachusetts General Hospital Psychiatry Gender Identity Program.