The number of sperm in a man's life depends on many factors such as health, age or diet of that man. Besides the number of sperm, the quality of sperm is also equally important in evaluating a man's sperm.

low sperm count means that the fluid (semen) ejaculated during orgasm contains fewer sperm than normal. A low sperm count has fewer than 15 million sperm per milliliter of semen. A low sperm count reduces the sperm's ability to fertilize an egg. However, many men with low sperm counts are still able to fertilize an egg.