Biology of sperm cells production

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Sperm production is hormonally driven. Brain hormones govern sperm production and are precisely controlled.
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Sperm - Molecular Biology of the Cell - NCBI Bookshelf
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Reproduction is essential for any species to sustain its population.
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Every second, the average man produces 1, sperm adding up to over billion over the course of his life. The machinery that makes sperm is a marvel of biology with a single goal in mind — creating life.
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Molecular Biology of the Cell.
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Spermatogenesis is a dynamic process occurring in a series of highly organized steps that culminates in the production of fully mature spermatozoa.
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Kutira teaches the "Wave" where one undulates erotically, to keep staring into his eyes with randy anticipation.

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