Although many people still think of infertility as a "woman's problem," in about 40% of infertile couples, the man is the sole cause or a contributing cause of the inability to conceive. One-third of infertility cases can be attributed to male problems, including low sperm count.
So it's crucial that men get tested for fertility as well as women. Yes, it can be embarrassing, but discovering male fertility problems early can mean earlier treatment and a successful pregnancy. Male infertility testing can also spare women unnecessary discomfort and expense.
If it takes just one sperm and one egg to create a baby, why must men make so many sperm? And how many sperm are considered normal? How long do sperm live? Can they survive outside the body? Do men stop making sperm as they age? Is there anything you can do to increase sperm production or improve the health of your sperm?
WebMD takes a look at the facts about sperm and answers these and other frequently asked questions.
A trained expert assesses the man's sperm count, their shape, movement, and other variables. Generally, a higher number of normal-shaped sperm means higher fertility. But exceptions are common. Many men with low sperm counts or abnormal semen are still fertile. And about 15% of infertile men have normal semen and plenty of normal sperm.
If the first semen analysis is normal, the doctor may order a second test to confirm the results. Two normal tests are usually interpreted to mean that the man doesn't have any significant infertility problems. If something in the results looks irregular, the doctor might order further tests to pinpoint the problem.
Surprisingly, if no semen or sperm at all are present (azoospermia), this can be a good thing. It might suggest a blockage in the "plumbing" that can be corrected with surgery.