- The process of sperm formation. The term was created from the prefix "spermato-" (Greek sperma, the seed or germ) + "genesis" (the coming into being of something) = the coming into being of sperm. Spermatogenesis is in contrast to oogenesis, the process of egg (ovum) formation.
* * *The entire process by which spermatogonial stem cells divide and differentiate into spermatozoa. SEE ALSO: spermiogenesis. SYN: spermatocytogenesis, spermatogeny. [spermato- + G. genesis, origin]
* * *sper·mato·gen·e·sis (.)spər-.mat-ə-'jen-ə-səs n, pl -e·ses -.sēz the process of male gamete formation including formation of a primary spermatocyte from a spermatogonium, meiotic division of the spermatocyte, and transformation of the four resulting spermatids into spermatozoa
* * *n.the process by which mature spermatozoa are produced in the testis. spermatogonium, in the outermost layer of the seminiferous tubules, multiply throughout reproductive life. Some of them divide by meiosis into spermatocyte, which produce haploid spermatid. These are transformed into mature spermatozoa by the process of spermiogenesis. The whole process takes 70-80 days.
* * *sper·ma·to·gen·e·sis (spur″mə-to-jenґə-sis) [spermato- + -genesis] the process of formation of spermatozoa, including both spermatocytogenesis and spermiogenesis.
Medical dictionary. 2011.