Have been used primarily as a softener, phthalates have been suspected to be responsible for infertility, mainly with men. These materials are widely distributed and are highly hazardous to health, because they impact the hormone budget of humans and damage fertility and development. Together with the phthalate loads, an increase in testicular cancer cases and mutations in male sexual organs are under discussion. Up to now it has been unclear to what degree phthalates enter into the human body. Results up to now demonstrate that these amounts, especially for children, are much higher than had been previously thought. Leading scientists and international expert committees have established the fact that phthalate absorption can be seen as a factor with the observed in sperm counts and therefore male fertility.