According to the sources, the process of spermatogenesis starts at puberty within the seminiferous tubules. The sequence begins with spermatogonia (immature male germ cells), which multiply via mitosis . Some spermatogonia differentiate into primary spermatocytes, which undergo the first meiotic division to form secondary spermatocytes . These then undergo a second meiotic division to produce haploid spermatids . Finally, the spermatids are transformed into spermatozoa (sperms) through the process of spermiogenesis .