Ethics, epidemiology, and women's health.
Ethical issues arise throughout the conduct of epidemiologic studies, in the processes of determining the study question, designing the protocol, and implementing the study. There also is an ethical dimension when studies are not done, for example, in studies of the effect of drugs and chemicals on male reproductive capacity. Harm as well as risk must be considered in the conduct of epidemiologic studies. The ethical principles that govern research, while independently justifiable, may come into conflict. Principles that govern research also may conflict with those that predominate in clinical practice. An example is the current controversy over unblinding anonymous, newborn human immunodeficiency virus seroprevalence studies to identify potentially infected infants. As women's health becomes more prominent on the research agenda, the resolution of these conflicts will become a complex challenge to epidemiologists, ethicists, clinicians, and the communities they serve.