Cross hormone therapy is illegal in India for people below the age of 18. Hence, gender dysphoria can only be diagnosed if you are at least 18, though the WPATH Standards of Care has set guidelines for its diagnosis in adolescents. Puberty kicks in roughly at 10-11 years of age. A dysphoric child at this age would be prescribed puberty blockers (Lupron) to delay puberty. If the dysphoria still persists by the age of 15, cross hormone therapy can be started with estrogen or testosterone. But this is illegal in India. On the bright side, laws are rarely enforced here. If you are at least 15, you can start the therapy if : 1) Your parents are supportive, and 2) You find an endo who is willing to prescribe you the hormones - pretty much easy if you have contacts in the medical fraternity.