 A variety of ethical concerns have been raised with respect to how prenatal testing may impact future children. Some authors worry that prenatal testing helps to inculcate an inappropriate stance towards parenting: perhaps parents will come to desire or expect “designer children” built to their specifications, and this may translate into an overly controlling attitude towards their children later in life, or an expectation that children will match an advance set of idealized expectations about what they will be like (Rothschild 2005, Introduction to Parens and Asch 2000). A related concern is that when carrying pregnancy to term becomes conditional upon the fetus having certain traits, our love for our children once they are born may become similarly conditional. Most broadly, questions regarding how prenatal screening and testing impacts the well-being of future children remain unresolved. At the moment, almost all prenatal testing screens or diagnoses well-defined medical disorders such as Down syndrome and Tay-Sachs disease. Ethical concerns will likely become yet more acute as the technology develops, particularly if it extends to testing for traits that are not clearly disorders, such as homosexuality, aggression, or a propensity to obesity.