Testing for genetic abnormalities has transformed pregnancy and motherhood, and the recent discoveries by the Human Genome Project affect us all. In this updated version of their important book with its new Afterword, the authors have incorporated the most recent prenatal testing information. Using their own research, the authors analyze the psycho-social and ethical implications of genetic testing. Among the issues discussed in the new Afterword are the spread of prenatal testing, the changing meanings of pregnancy, and the perils and promises of the Human Genome Project.