**1. Introduction**

Approximately, 10–15% of human couples of reproductive age have impaired fertility and male factor is responsible in 50% of these cases. As is well-known, human reproduction is precisely regulated and extremely fragile to the environmental changes. Let alone harmful chemicals, even body temperature could affect sperm quality. In this chapter, we discuss two well-known major aspects that contribute to male infertility such as endocrine-disrupting chemicals (EDCs) and lifestyle factors.

© 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. © 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
