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spermatogeˈnetic
spermatogenesis n. 
/ˌspərˌmædəˈdʒɛnəsəs/ the formation and development of spermatozoa (cf. spermiogenesis n.); so spermatogeˈnetic, spermatoˈgenic, adjs., spermatoˈgenically adv.
Brit. /ˌspəːmətə(ʊ)ˈdʒɛnᵻsɪs/
, /ˌspəːmətə(ʊ)ˈdʒɛnᵻsɪs/U.S. /ˌspərmədəˈdʒɛnəsəs/
, /ˌspərmədəˈdʒɛnəsəs//ˌspərˌmædəˈdʒɛnəsəs/ΘΚΠ
the world > life > biology > biological processes > procreation or reproduction > fecundation or impregnation > [noun] > development of spermatozoa
spermatogenesis1880
spermiogenesis1920
1880 Allman in Linn. Soc. Jrnl., Zool. XV. 136 These I regard as the remains of the spermatogenic tissue.
1881 Athenæum 11 June 787/1 M. Mathias Duval on spermatogenesis.
1886 Encycl. Brit. XX. 412/1 The process of spermatogenesis in the Bull, Dog, and Rabbit.
1886 Encycl. Brit. XX. 412/1 Ascribing spermatogenetic functions both to the spermatoblasts and to the round cells.
1978 P. J. Hogarth Biol. Reprod. ii. 11 The final phase of spermatogenesis in the testes is known as spermiogenesis.., and consists of the progressive conversion, without division, of the spermatids into functional spermatozoa.
1980 Nature 10 Apr. 548/1 Spermatogenically active testes.
1980 D. J. Begley et al. Human Reprod. iii. 30/2 Following spermatogenesis and spermiogenesis, which take about 64 days in man, sperm pass through the rete into the epididymis.
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