Christine A Clark1, Karen A Spitzer2, Carl A Laskin3. 1. Research Associate; cclarksolo@aol.com. 2. Study Coordinator, LifeQuest Centre for Reproductive Medicine and Mt. Sinai Hospital; 3. Associate Professor, Departments of Medicine, Obstetrics and Gynecology and Immunology, Faculty of Medicine, University of Toronto; and LifeQuest Centre for Reproductive Medicine, Toronto, Ontario, Canada.