What is the term used to define the gradual decline in testosterone levels in a man's life?

The term that describes the gradual decline in testosterone levels in a man's life is "andropause." This phenomenon typically occurs in middle-aged to older men, where testosterone levels decrease gradually, unlike menopause in women, which involves a more definitive and rapid decline in hormone levels.

Andropause can lead to various physical and emotional symptoms, including decreased libido, fatigue, and mood changes. Unlike adolescence, which refers to the phase of rapid physical and hormonal changes during puberty, andropause is characterized by a slow and gradual hormonal decline. Senescence refers to the biological aging process in general rather than a specific decline in testosterone levels. Therefore, andropause specifically addresses the male experience of reduced testosterone over time, making it the correct term for this gradual decline.