There is no definitive data on how old a male patient will be without sperm, as fertility and the degree of decline vary greatly from patient to patient, with the general principle being that the older the male patient, the lower the fertility, and there is a marked decline in the quantity and quality of sperm in the body. Most men start to produce sperm in their testicles around the age of 14, with new sperm being produced every day. The ability to produce sperm reaches its peak between the ages of 20 and 30, and then begins to decline gradually, with the vast majority of patients being able to produce sperm around the age of 60, but the number of sperm at this time will be very low, and sperm may still be present even at the age of 70, but the quality is usually poorer. From the above, it can be seen that male fertility declines with age, and fertility is usually lost around the age of 60-70.