Question 1: In males, first pubertal sign is:
- A. Pubic hair development
- B. Hoarseness of voice
- C. Penis enlargement
- D. Testicular enlargement (Correct Answer)
Explanation: ***Testicular enlargement***
- The first noticeable sign of puberty in males is typically **testicular enlargement**, followed by other changes.
- This enlargement is due to the increase in the size of the **seminiferous tubules** and the production of sperm.
*Pubic hair development*
- While pubic hair development is an important pubertal sign, it usually follows **testicular enlargement**, appearing as the second or third sign.
- It is driven by the increase in **adrenal androgens** and **testosterone**.
*Hoarseness of voice*
- The voice change or **deepening (hoarseness)** usually occurs later in puberty, as the larynx grows and vocal cords lengthen.
- This is a secondary sexual characteristic mediated by **testosterone**.
*Penis enlargement*
- **Penis enlargement** typically begins after testicular enlargement has been established, usually around a Tanner stage 3.
- This growth is also directly stimulated by increasing levels of **testosterone**.