What is the first sign of puberty in boys?

The first sign of puberty in boys is testicular enlargement. This change typically occurs between the ages of 9 and 14 and marks the onset of puberty. As the testes begin to grow, it indicates the body’s preparation for the production of sperm and the secretion of testosterone. This hormonal change initiates various physical developments associated with male puberty.

Following testicular enlargement, other signs like the growth of body hair, deepening of the voice, and height increase occur. However, these developments are secondary and happen after the initial change in the size of the testes. Understanding the biological sequence of puberty is crucial in pediatric care, as it helps in recognizing the normal development milestones in boys.