Although prenatal testing has rarely been publicly justified in terms
of its cost-effectiveness, public health administrators and policy makers
concerned about the costs of “heroic” lifesaving interventions for
neonates could hardly be oblivious to the actual and potential savings
implicit in selective abortion. Many of the most expensive health conditions
are not, and never will be, detectable by prenatal genetic testing,
because they arise from accidents of various sorts or have complex
etiologies in which genetic variations play only a slight or probabilistic
role. Nevertheless, there is evidence that the incidence of several
diseases and impairments thought, correctly or not, to impose significant
health care costs has fallen – or has failed to increase as expected
because of other factors, such as increased maternal age – as the vast
majority of women who employ prenatal



