1. Clinical application of oocyte vitrification: a systematic review and meta-analysis of randomized controlled trials 
Ana Cobo, Ph.D., César Diaz, M.D. 
Fertility and Sterility 
Volume 96, Issue 2, Pages (August 2011)
DOI: /j.fertnstert
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1 Flow chart of the study selection process.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Odds ratio of postthawing/warming oocyte survival rate after vitrification and SF. (A) Fixed-effects model. (B) Random-effects model.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

4. Figure 3
Odds ratio of fertilization rate. (A) Vitrification versus SF. (B) Vitrification versus fresh oocytes. Fixed effects-model.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions