1. Department of Human Genetics (B.S.E., D.L.B., S.A.C.), The University of Michigan, Ann Arbor, Michigan 48109-0638;
2. Department of Pathology (N.E., R.Y.O.), Tokai University, Isehara, Kanagawa 259-1193, Japan;
3. Animal Reproduction and Biotechnology Laboratory (J.L.H., C.M.C.), Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado 80523;
4. Institut National de la Santé et de la Recherche Médicale Unité 709 (J.C.), Reproduction et Physiopathologie Obstetricale, Hopital Cochin, Paris, France 75014