spermatogenesis
Concise Oxford English Dictionary © 2008 Oxford University Press:
spermatogenesis /ˌspəːmətə(ʊ)ˈdʒɛnɪsɪs, spəˌmat-/
▶noun Biology the production or development of mature spermatozoa.
'spermatogenesis' also found in these Oxford entries:

