1. Optimizing the number of blastocyst stage embryos to transfer on day 5 or 6 in women 38 years of age and older: a Society for Assisted Reproductive Technology database study 
Judy E. Stern, Ph.D., Marlene B. Goldman, Sc.D., Harry Hatasaka, M.D., Todd A. MacKenzie, Ph.D., Catherine Racowsky, Ph.D., Eric S. Surrey, M.D. 
Fertility and Sterility 
Volume 91, Issue 1, Pages (January 2009)
DOI: /j.fertnstert
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Pregnancy, delivery, and multiple rates according to number of embryos transferred for women 38 to 42 years old. Assisted reproductive technology transfer outcomes are shown as a function of numbers of embryos transferred in each age group. Red diamonds are pregnancy rates (at least one fetal heartbeat per transfer). Delivery rate per transfer (blue squares), twin rate per transfer (green triangles), and high-order multiple rates (purple boxes) are also shown. (A): Women 38 years old. (B): Women 39 years old. (C): Women 40 years old. (D): Women 41 to 42 years old.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions