The spermatozoa or semen is not a rigid object but is a living cell and differs from other cells that have the ability to move and swim because of its creator's components such as the energy generator and whip (or tail). More than 60% of these sperm must be active for 6 hours after ejaculation so that they can travel the long journey from the top of the vagina to the fallopian tube, where the egg looks sperm and thus fertilizes. (See picture below topic).