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Effect of age on male fertility. While the effect of age on a man's fertility is not as significant as it is with women, there is a decline in the quality of sperm after the age of 45. After this age, it does tend to take longer for men to cause a pregnancy and the chance of having a baby with a health problem does slightly increase.
There are no limits, either in age or number, to the amount of sperm produced in a lifetime. Despite being forever fertile, male fertility does decline with age. Male fertility, unlike female fertility, doesnât decline to the point of complete infertility. There are no limits, either in age or number, to the amount of sperm produced in a lifetime. Despite being forever fertile, male fertility does decline with age. The exact age depends on the man, but there are some universal changes in male sperm to consider. The Young and Vibrant Sperm Prior to 35, male sperm is young and vibrant.