A couple is considered infertile if the woman hasn't been able to conceive for one year after regular trying. A woman who becomes pregnant but has repeated miscarriages is also considered infertile.

It can be caused by a reproductive problem in the man, the woman, or both of them. In some instances no cause for the infertility is found in the couple and in some cases more than one reason is found to be responsible of infertility. The number of men and women suffering from infertility are roughly equal