The process of spermatogenesis is mainly derived from spermatogonia. The spermatogonia are arranged in layers in the spermatogenic tubules of the testis, then to the primary spermatocytes, then to the secondary spermatocytes, and then to the spermatocytes, which are haploid gametes. The sperm cell is round and slowly develops into a tadpole-like sperm with a head, body and tail through some metamorphic reactions and a process of decellularization. The spermatozoa are motile, and after they are produced in the varicocele, they are transported through the testicular fluid to the epididymis, where they run slowly for about 15 days before maturing and being expelled during sexual intercourse. So in the testes, the process from spermatogonia to sperm cells to spermatozoa may take more than 60 days, and then 15 days to mature in the epididymis, and finally to be expelled from the body. So, it takes about 2-3 months for a spermatogonial cell to become a spermatozoon.