After explaining the origin, nature, and goals of genetic counseling, we co
nsider the impact of the Human Genome Project on its practice. In light of
the availability of presymptomatic tests for late-onset disorders and the p
ossibility of preventive behavior or treatment, we examine the apparent con
flict between nondirectiveness and directiveness in genetic counseling. We
discuss views of genetic counselors, medical geneticists, and counselees on
specific issues, and document gender differences in attitudes toward genet
ic ties to offspring. Because genetic discrimination and unequal access to
genetic services are likely to increase with advances in genetics, we concl
ude that efforts of genetic counselors to adhere to the principle of justic
e or equity in their practice cannot be successful without governmental and
public support, as well as support from researchers and colleagues in heal
th care.