Added an article to our Infertilty Section by Dr. Mike Berkely:
While a woman is born with all the eggs she’ll ever have, men produce sperm on a continual basis. Therefore, what a man does on a daily basis can affect the sperm maturation process.

Smoking, drinking, drugs, stress, poor nutrition and lack of exercise all can contribute to poor sperm quality. And, it was recently discovered, a man’s sperm quality begins to decline around the age of 25.

There are five main factors that contribute to overall sperm quality. They include sperm motility, speed, count, concentration and morphology (shape and size)……

Click here to read the full well written article on Gettingpregnant.com