Examlex
As aging occurs,people's ability to concentrate on a task for an extended period of time ____.
Testosterone
A steroid hormone that plays a key role in the development of male reproductive tissues and the promotion of secondary sexual characteristics.
Testes
The male reproductive glands that produce sperm and hormones, including testosterone.
First Trimester
The initial stage of pregnancy, lasting from conception to the end of the 12th week, characterized by critical developmental processes.
Fetal Development
The process of growth and maturation of a fetus within the womb from conception to birth.
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