1. Contrasting patterns in in vitro fertilization pregnancy rates among fresh autologous, fresh oocyte donor, and cryopreserved cycles with the use of day 5 or day 6 blastocysts may reflect differences in embryo-endometrium synchrony 
Bruce S. Shapiro, M.D., Said T. Daneshmand, M.D., Forest C. Garner, M.Sc., Martha Aguirre, Ph.D., Richard Ross, M.Sc. 
Fertility and Sterility 
Volume 89, Issue 1, Pages (January 2008)
DOI: /j.fertnstert
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

2. FIGURE 1
The pattern of clinical PRs for day 5 blastocysts (blue bars) and day 6 blastocysts (yellow bars) showed distinct differences in fresh autologous, FET, and donor cycles.
Fertility and Sterility  , 20-26DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions