A word profile program has been developed in conjunction with the services of the Institute for Scientific Information for surveying the literature in teratology, developmental biology, and reproductive biology. It has been revised many times to improve the discriminating qualities of the program. It should provide scientists with a current review of the published articles in the field for a relatively low cost. This same program, if purchased as an individual subscriber, would cost ten times the ISI regular subscription price for the ASCA service. Colleagues and subscribers are encouraged to make recommendations that will improve the program.