Vitamins: essential organic nutrients, required in small amounts, that cannot be synthesized by the body. Required for growth, maintenance, reproduction and lactation. Vitamin deficiency: decline in health due to the lack of a vitamin in a ration.itamins: essential organic nutrients, required in small amounts, that cannot be synthesized by the body. Required for growth, maintenance, reproduction and lactation. Vitamin deficiency: decline in health due to the lack of a vitamin in a ration.
Spermatogenesis is the process by which the male gametes, called sperm, are created. Spermatogenesis takes place in the seminiferous tubules, which are an intricate system of tubules in the testes where spermatogenesis takes place.
Reprinted with Permission by DrRajMD. The production of sperm, or spermatogenesis, is a complicated process of cell division. First, primitive germ cells known as spermatogonia divide to produce offspring cells, or spermatocytes, that ultimately redivide twice to form young sperm cells known as spermatids.lmost five (4.6) cycles are needed to produce a mature sperm from a germ spermatogonium cell. Thus, the entire sperm production process takes about 2 1/2 months (16 days x 4.6 cycles = 74 days, or 2 1/2 months). So, sperm that are mature now may have been affected by risk factors that were present 2 to 3 months ago.