Which hormone is primarily associated with male characteristics and reproductive functions?

Testosterone is the hormone primarily associated with male characteristics and reproductive functions. It is crucial for the development of male primary and secondary sexual characteristics during puberty, such as increased muscle mass, deepening of the voice, and growth of facial and body hair. In adult males, testosterone is essential for maintaining libido, sperm production, and overall reproductive health.

In comparison, estrogen, although primarily a female hormone, also plays roles in males but is not associated with male characteristics. Aldosterone is involved in regulating sodium and potassium levels and is not linked to sexual characteristics. Progesterone is mainly known for its role in the female reproductive cycle and is not a key hormone in male reproductive functions. Thus, testosterone distinctly stands out as the principal hormone related to male traits and reproductive activities.