1. Cryopreservation of supernumerary high quality embryos predicts favorable outcomes for patients undergoing repeated cycles of in vitro fertilization 
Jeff G. Wang, M.D., Nataki C. Douglas, M.D., Cary Dicken, M.D., Gary S. Nakhuda, M.D., Michael M. Guarnaccia, M.D., Mark V. Sauer, M.D. 
Fertility and Sterility 
Volume 89, Issue 2, Pages (February 2008)
DOI: /j.fertnstert
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Flow diagram of treatment outcomes starting from the initial fresh cycle for 1,037 patients undergoing nondonor IVF/intracytoplasmic sperm injection. FET = frozen embryo transfer.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Pregnancy (A) and embryo implantation rates (B) in patients undergoing repeated fresh IVF cycles without intervening frozen embryo transfer (FET) cycles (groups B and C) were significantly lower than those of patients who had excess cryopreserved embryos for at least one cycle of FET (groups D, E, F, and G) (P<.001). In cycle 3, groups C and G are both composed of patients undergoing fresh IVF/intracytoplasmic sperm injection, but the pregnancy and implantation rates were significantly higher for those who had an intervening FET cycle using the supernumerary embryos produced from the initial fresh cycle (group G) (P<.002).
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions