The male reproductive system in a dog is made up of the scrotum, testicles, epididymides, deferent ducts, spermatic cords, prostate, penis and urethra. (breeders.net)
The first generation of male contraceptives will likely employ hormones to block spermatic development. (scientificamerican.com)
It is reminiscent of the «spermatic logos» in Stoicism, the fine particles of universal reason that are the life - force in all things. (religion-online.org)