Testosterone has two main jobs:
1) It causes masculinizing changes to occur throughout the body.
2) It suppresses the production of estrogen. Some of the changes caused by testosterone are permanent (they would remain if testosterone was stopped), and other changes are reversible.
Testosterone causes voice deepening, clitoral growth, body/facial hair growth and sometimes male-pattern balding (also influenced by age, genetics). Testosterone may irreversibly affect fertility. Desires for fertility should be considered prior to starting hormones, and for those seeking fertility preservation (or education about fertility preservation), referrals can be made to Lurie Children’s Fertility Preservation Program.