Robert E. Garfield, Ph.D., is Professor and Director of Reproductive Sciences in the Department of Obstetrics and Gynaecology at The Univesity of Texas Medical Branch in Galveston, Texas. Thomas N. Tabb, M.D., is an Assistant Professor of Obstetrics and Gynaecology in the Division of Maternal Fetal Medicine at The University of Texas Medical Branch at Galveston.