The male infertility it's the first things doctors look in a couple whit problems of infertility, this its because the test on man are very less invasive than those for the woman, Of course if the test come back as fine in the case of the man, the doctor can pretty much assume that it is the woman who has the fertility problem.
Male Infertility Causes
The most common question among men who find out that they are infertile is what the male infertility cause in their case was just because they want to know if it was something related to something they did. The causes of infertility can be different from man to man, therefore just one man cannot give single cause for the male infertility.
The possibilities of the infertility it could be genetic. If your father its someone who could have the sperm count low this its most likely the reason of you situation. Now the doctors have proven that lower sperm counts and abnormal sperm conditions run in families. So if you have the opportunity you should talk to your dad and verify if he had any kind of problems about this.
Get injured can trigger male infertility. A lot of men who injured their penis or the scrotum structure at some point in their life, for example when they were a little kid, and in many cases results in infertility.
The reason for the infertility diagnostic has no impact on the future, in other words doesn't mean that they have zero chances of getting pregnant as a couple, it just means that they are not gonna be able to do it the normal way or the old-fashioned way and instead are most likely going to have to take advantage of the technology and use the infertility treatments that exists today.