1. Center for Fertility and Reproductive Endocrinology (M.J.D.S., B.E.M., A.A.L.), New Britain General Hospital, New Britain, Connecticut 06050
2. the Department of Biological Sciences, Ohio University (A.B.L., C.G.C.), Athens, Ohio 45701
3. the Division of Health Professions, University of Hartford (L.S.P.), West Hartford, Connecticut 06117
4. the Institute for Toxicology and Environmental Health, University of California (B.L.S.), Davis, California 95616