Spermiogenesis is the final stage of spermatogenesis, which sees the maturation of spermatids into mature, motile spermatozoa. The spermatid is a more or less circular cell containing a nucleus, Golgi apparatus, centriole, and mitochondria. All these components take part in forming the spermatozoon.

However, in spermiation, the spermatozoa are released from the Sertoli cells into the cavity of seminiferous tubules before they are passed through the epididymis.