In Rationality and the Genetic Challenge: Making People Better? Matti Häyry provides a clear and informed discussion and analysis of a number of competing answers to the above questions. Häyry describes three main perspectives on the morality of prenatal genetic diagnosis , the “restrictive,” “moderate,” and “permissive” views, and his analysis illuminates that these views can be distinguished in terms of their different “rationalities”—their respective understanding of what counts as a reasonable choice for parents to make in light of PGD.