من طرف 
A man's fertility means the ability to produce sperm naturally able to fertilize the woman's egg and the incidence of pregnancy and so normal sperm be must be certain specifications as follows: Size: about 3 mL (2-6) Number: 15 million sperm per milliliter or more movement: 50% of the sperm are still active after moving two hours. At least 60% of the sperm in the sample appears to be normal is mutilated or dead. How man increases the fertility of the important reasons that are common to the inability of a man to have children, or nettlesome, include the following elements: man needs to seminal fluid containing a sufficient number of sperm, and the sound quality in shape and movement capabilities of those sperm. And these types of potential trouble include: * An absolutely free means of sperm azoospermia. * Presence means a low number of animals
Sperm oligospermia.
Sperm oligospermia.
The presence of a liquid containing a high percentage of sperm but incomplete growth, or sperm deformed shape. The presence of semen contains a high proportion of lazy sperm that do not have active in the movement: the promise of cases of free sperm from sperm, other disorders in sperm, in shape or movement or number, may be causes genetic or the result of several behaviors lifestyle, such as smoking or alcohol abuse or eating some of the medicines. It may also be the result of chronic diseases, such as kidney failure, or certain diseases such as mumps Khalafattrh childhood, as well as a decrease in the proportion of hormones needed to produce sperm, or the presence of disturbances in the body's immune system.
Lack of sperm
The presence of sperm-free absolute sperm is why about 15 per cent of cases of infertility. There are two reasons may lead to get this total absence of sperm in the semen. First, the inability of the testicles to produce any sperm. Either as a result of a problem with the genetic Balkromusumaat. Or due to lack of sufficient proportion of hormones necessary for the process of sperm production. And the inability of the testicles to produce any sperm is why 60 per cent of cases of «the absence of semen from sperm». The second reason, the non-arrival of sperm that are already formed and produced by the testis, the mixing of sperm out of a man's body when ejaculation. In other words; a «blockage» hinder such access and mixing. This is why 40 per cent of cases of «the absence of semen from sperm». It is the result of the presence of damage in sperm transfer tubes and this damage in the course of these tubes may be congenital, or as a result of previous microbial infections, such as sexually transmitted diseases, microbes
Varicose testicles
As a result of the presence of veins dilated, and containing relatively large amounts of blood, temperature rises in the testis, the convergence of what is normal within the body, and because the relative coolness is essential to the process of sperm production effectively, it is most common causes of male infertility is the presence of varicose testicles, specifically the low number of sperm. It can also cause varicose testicular abnormalities in sperm shape or a basket for the movement. Medical statistics show that 40 per cent of infertile men, already have varicose veins in the testicles. It is easy for the doctor to identify the existence of this varicose veins, and can be treated and removed efficiently; surgery or catheter. This observation is confirmed with the American Urological Association that varicocele is at 15 per cent of men aged below 45 years, and is therefore not necessarily be leading to infertility in all patients, but some of them.
