Preimplantation genetic diagnosis (PGD) is a technique used for genetic testing of in-vitro-fertilized embryos to determine whether they are normal or not. This technique is spreading gradually to various countries. However, it is often criticized for its concept of “choice of life.” In Switzerland, the Reproductive Medicine Act, which came into force on January 1, 2001, clearly prohibited PGD. The situation began changing in 2005, when the Swiss Parliament passed a motion to remove the ban on PGD. Finally, on December 12, 2014, the parliament approved amendments to the Reproductive Medicine Act and Article 119 of the Federal Constitution, regarding reproductive medicine and gene technology involving human beings. According to the revised Reproductive Medicine Act, PGD is permissible under appropriate conditions. In this article, I explain the process of the revision and examine the permissible conditions to carry out PGD.