WPATH: The World Professional Association for Transgender Health (WPATH), formerly the Harry Benjamin International Gender Dysphoria Association (HBIGDA), is a professional organization devoted to the understanding and treatment of gender identity and gender dysphoria, and creating standardized treatment for transgender and gender variant people. (https://en.m.wikipedia.org/wiki/World_Professional_Association_for_Transgender_Health)
HRT: Transgender hormone therapy, also called hormone replacement therapy (HRT) or gender-affirming hormone therapy (GAHT), is a form of hormone therapy in which sex hormones and other hormonal medications are administered to transgender or gender nonconforming individuals for the purpose of more closely aligning their secondary sexual characteristics with their gender identity (https://en.m.wikipedia.org/wiki/Transgender_hormone_therapy)