Which hormone is responsible for the change from boyhood to adulthood at puberty?

The hormone responsible for the change from boyhood to adulthood at puberty is testosterone. This hormone plays a crucial role in the development of male secondary sexual characteristics, including increased muscle mass, deepening of the voice, and growth of facial and body hair. It initiates numerous changes during the puberty stage, reflecting the physical and physiological transition from childhood to adulthood in males.

While estrogen and progesterone are primarily associated with female pubertal development and reproductive functions, testosterone specifically drives the male changes during puberty. Oxytocin, on the other hand, is involved in social bonding and reproductive behaviors, but does not play a direct role in initiating the physical changes associated with puberty. Therefore, the emphasis on testosterone highlights its importance in male developmental biology during this critical growth period.