How do sperm form? The formation of sperm is a slow process, with a cycle of about 90 days. It begins with the formation of the most primitive sperm cells in the seminiferous tubules, and then continues to develop. When the development reaches a certain stage, the sperm is discharged into the epididymis, where it will gain mobility. At this time, the sperm is an active sperm, which is discharged from the body with the movement of ejaculation, At this time, the sperm can combine with the egg to form a fertilized egg. Therefore, the formation of sperm is a relatively slow process, and the specific thing is to consult a professional doctor.