Gametogenesis is the process by which male and female sex cells (gametes) are formed in the male and female gonads (testes and ovaries).
The principle of oogenesis: the use of oocytes formed before birth. Constant decrease in oocytes starting from the embryonic period. Exhaustion during menopause.
The principle of spermatogenesis: continuous production. Although sperm cells are constantly born from puberty to old age, production is subject to extreme fluctuations in both quantity and quality.
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