1. Department of Obstetrics and Gynecology and Green Center for Reproductive Biology Sciences (B.C.T., M.L.A., D.M., M.M.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
2. Department of Pediatrics, Cell, and Developmental Biology (J.R., N.E., B.C.P.), Vanderbilt University, Nashville, Tennessee 37221
3. Department of Mechanical Engineering (S.S.), Massachusetts Institute of Technology, Cambridge, Massachusetts 02139–4307
4. Department of Eicosanoid Core Laboratory (G.L.M.), Vanderbilt University, Nashville, Tennessee 37221
5. Department of Internal Medicine (R.J.A.), University of Michigan, Ann Arbor, Michigan 48109
6. Department of Obstetrics and Gynecology (M.H.), Tufts Medical Center, Boston, Massachusetts 02111