1. From the Magee-Womens Research Institute and Departments of Environmental and Occupational Health (R.E.G., V.A.T., W.H., A.A., J.J., B.P., C.A.H., V.E.K.) and Obstetrics, Gynecology, and Reproductive Sciences (A.D., G.H., C.A.H.), Center for Free Radical and Antioxidant Health (R.E.G., V.A.T., J.J., B.P.), University of Pittsburgh, Pittsburgh, Pa; and the Department of Obstetrics, Gynecology and Reproductive Sciences (R.N.T.), University of California, San Francisco.