system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 5-year-old girl with no significant medical history is brought to her pediatrician because her mother is concerned about her axillary hair development. She first noticed the hair growth a day prior as she was assisting her daughter in getting dressed. The girl has no physical complaints, and her mother has not noticed a change in her behavior. On physical exam, the girl has scant bilateral axillary hair, no breast development, and no pubic hair. The exam is otherwise unremarkable. Activation of which of the following is responsible for this girl's presentation?
assistant
Adrenal glands