The case study discussed in this chapter is about parents that want to cure their daughter’s disease by planning and creating another child with specific genetic markers. This dilemma and discussion case was designed for an introductory course in developmental psychology but it can be used in many introductory science classes. The objectives of this chapter are (1) to demonstrate a basic understanding of how developmental disorders can be transmitted genetically, including the differences between disorders triggered by recessive genes, X-linked genes, and genetic mutation, (2) to explain in vitro fertilization and pre-implantation genetic diagnosis, including basic risks involved with the procedures, and (3) to consider and discuss ethical issues involved in these procedures. This sample chapter also includes the Table of Contents, Introduction, and Index.