Examlex
A self-regulating method:
Primary Sexual Characteristics
These are the physical features directly involved in reproduction, such as the ovaries in females and the testes in males.
Secondary Sexual Characteristics
Traits that emerge in organisms during puberty but are not directly involved in reproduction, such as breast development in females and facial hair in males.
Testosterone Levels
The concentration of the hormone testosterone in the bloodstream, which plays key roles in male reproductive and secondary sexual characteristics.
Older Men
Generally refers to men who are significantly beyond the middle age, often considered within the context of aging-related issues and experiences.
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