Aging and male fertility...
A man’s ability to produce sperms throughout his life should not be seen to mean that all of his sperms will be functional, or of high-quality. As men age, the volume, motility, and quality of their sperms decline. In one of the largest reviews to date on male fertility, published in the journal Fertility & Sterility in 2001, researchers found that between ages 30 and 50, an average man’s Sperm declines...


