1. From the Division of Reproduction & Endocrinology (A.-M.S., P.A.M., M.A., M.R.C., J.M.M., L.P., P.D.T.) and Applied Biomedical Research Group (A.R.), King’s College London, UK; the Laboratory for Health Protection Research (E.H.J.M.J., A.H.P.), National Institute for Public Health and the Environment, Bilthoven, Netherlands; the Department of Clinical Biochemistry (S.E.O., D.F.T.), University of Cambridge, UK; and the Institute of Life Sciences (C.R.), Université Catholique de Louvain, Louvain...