The infertility is the result of various problems, most of which can be corrected. In general, the causes of infertility can be divided into seven categories. Listed below are the causes and its percentage.
1 .- Male Factor [35%]
2 .- Infertility of unknown origin [20%]
3 .- Factors tubáricos [15%]
4 .- disorders of ovulation [15%]
5 .- advanced maternal age [10%]
6.-  Endometriosis [10%]
7 .- cervical and uterine disorders [5%]
    
A common but false, is that infertility is primarily a problem of women. Indeed, the male factor affecting the same percentage as the female factor.

An additional 25% of couples seeking pregnancy have more than one factor or more of a condition that affects their ability to reproduce.

In recent years, infertility on the age has become an increasingly common problem. Men and women are most fertile at the age of 24 years. The fertility rates begin to decline after 35 years.