Ace the Certified Pediatric Nurse (CPN) Exam 2025 – Leap into Your Nursing Adventure!

The first sign of puberty in males is testicular enlargement. This initial change signifies the beginning of spermatogenesis and the body's preparation for eventual fertility. Typically, this process starts between the ages of 9 and 14 and is accompanied by hormonal changes, primarily involving an increase in testosterone levels.

Testicular enlargement is a distinct and observable change that marks the onset of secondary sexual characteristics and the entire maturation process. Following this first sign, other developments like the growth of pubic hair and a growth spurt often occur, but they are considered secondary changes following the enlargement of the testes. Recognizing testicular enlargement as the first sign helps nursing professionals and caregivers monitor normal development during puberty.