Puberty is the period where the reproductive system is fully developed and it is now able to be used. During the period, the boy goes under several physical changes.
Puberty begins when the hypothalamus secretes GnRH. This hormone acts on the anterioor pituitary gland, causing it to release two different sex hormones: FSH and LH. These hormones causes the sperm to testes to produce sperm and testosterone.
Most men experience a condition called andropause, which is the gradual decline of testosterone due age. The symptoms are fatigue, depression, loss of muscle.
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