A spermatogenic cycle lasts for about 90 days, but there is wide individual variation. Spermatozoa mainly come from the spermatogenic cells in the epithelium of the seminiferous tubules in the male testis. The spermatogonia begin to differentiate, forming primary spermatocytes through mitosis, then secondary spermatocytes and spermatids are formed again, and spermatids further divide to form immature spermatozoa, a process that takes about 74 days. The immature spermatozoa are stored in the epididymis and take 14-16 days to develop and mature, so it takes about 90 days for a spermatozoa to be produced and fully matured, but this is not a generalization and there are individual differences. Factors such as a man’s age, mood, eating and sleeping habits, working environment and temperature all have an effect on the sperm production cycle. Normal men produce sperm every day. If you find azoospermia or oligozoospermia, it is recommended to go to the hospital to avoid delaying your condition.