How does vitrification affect oocyte viability in oocyte donation cycles? A prospective study to compare outcomes achieved with fresh versus vitrified sibling oocytes

M. Sole1,2,*, J. Santalo2, M. Boada1, E. Clua1, I. Rodriguez3, F. Martinez1, B. Coroleu1, P.N. Barri1, and A. Veiga1,4 Reproductive Medicine Service, Department of Obstetrics, Gynecology and Reproduction, Institut Universitari Dexeus, Gran Via Carles III, Barcelona 08028, Spain Unit of Cellular Biology, Faculty of Sciences, Universitat Autonoma de Barcelona, Barcelona, Spain Unit of Biostatistics, Department of Obstetrics, Gynecology and Reproduction, Institut Universitari Dexeus, Barcelona, Spain Barcelona Stem Cell Bank, Center of Regenerative Medicine, Barcelona, Spain