1. Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology (T.M., G.I.P., B.R.R., J.L.T.), Massachusetts General Hospital/Harvard Medical School, Boston, Massachusetts 02114
2. Section of Immunobiology, Yale University School of Medicine (T.S.Z., R.A.F.), New Haven, Connecticut 06510
3. Department of Obstetrics and Gynecology, University of Kansas School of Medicine, and Wesley Medical Center (T.R.K.), Wichita, Kansas 67214