Gary Adamkiewicz, M. Patricia Fabian, Teresa Chahine, John D. Spengler, and Jonathan I. Levy, are with the Department of Environmental Health Harvard School of Public Health, Boston, MA. M. Patricia Fabian and Jonathan I. Levy are also with the Department of Environmental Health at the Boston University School of Public Health. Ami R. Zota is with the Program on Reproductive Health and the Environment, University of California, San Francisco. Rhona Julien is with the US Environmental Protection Agency,...