Genetics of female and male infertility.

Infertility is defined as the inability to conceive within one year of unprotected intercourse, and the causes are equally distributed between both sexes. Genetics play a crucial role in couple infertility and respective diagnostic testing should follow available guidelines. Appropriate tiered genetic analyses require comprehensive physical examination of both partners in an infertile couple. A wide range of chromosomal and monogenic variants can be the underlying genetic cause of infertility in both women and men. Accurate clinical phenotyping, together with identification of the genetic origin, helps to recommend the proper treatment and to counsel couples on the success rates and potential risks for offspring.