Answer from: Levan Donadze, Dr.
Infertility is a failure to achieve a pregnancy within one year of regular, unprotected sexual intercourse. Infertility is a widespread issue. For about 20% of infertile couples, the problem is only in the male partner. For about 30% of couples, the problem lies in both partners. Therefore, the man contributes to infertility in around half of all cases. About one in 20 men have low numbers of sperm, causing infertility. However, only about one in every jundred men has no sperm at all.
How many men suffer from infertility?
Infertility is defined as not being able to conceive after one year (or longer) of unprotected intercourse. Male infertility is often caused by certain deficiencies in the semen, e.g. its DNA fragmentation. How common is it?