Craig Niederberger1, Eve Feinberg2, Antonio Pellicer3. 1. Department of Urology, College of Medicine, University of Illinois, Chicago, Illinois. 2. Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Feinberg School of Medicine, Northwestern University, Chicago, Illinois. 3. Instituto Valenciano de Infertilidad, Rome, Italy.