1. Reduced oxygen tension improves embryo quality but not clinical pregnancy rates: a randomized clinical study into ovum donation cycles 
Maria J. de los Santos, Ph.D., Pilar Gámiz, Ph.D., Carmela Albert, Ph.D., Arancha Galán, Ph.D., Thamara Viloria, Ph.D., Sonia Pérez, Ph.D., Josep Ll. Romero, Ph.D., José Remohï, M.D. 
Fertility and Sterility 
Volume 100, Issue 2, Pages (August 2013)
DOI: /j.fertnstert
Copyright © 2013 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Flow chart of the randomized trial. ITT = intention-to-treat population.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2013 American Society for Reproductive Medicine Terms and Conditions