Spermatogenesis is the process by which mature haploid spermatozoa or sperm cells develop from germ cells. This process takes place in the seminiferous tubules of the testis. The process starts with the diploid spermatogonium. It undergoes mitosis to produce either primary spermatocyte or additional spermatogonia. Spermatogonia divide to give rise to primary spermatocytes. Each primary spermatocyte undergoes meiosis I to produce 2 haploid secondary spermatocytes. Secondary spermatocytes undergoes meiosis II to give rise to 2 spermatids each. Spermatids contain haploid number of chromosomes. Each spermatids then ultimately develop into mature haploid spermatozoa.