1. Pregnancy Rate and Implantation Rate Calculations Have Limitations That Can be Overcome by Using Probability 
J.R. Trimarchi, R.J. Hackett, D.L. Keefe 
Fertility and Sterility 
Volume 84, (September 2005)
DOI: /j.fertnstert
Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
summarizes the IPSs for various combinations of the number of embryos transferred and the number of resulting implantations. Each combination provides a unique IPS value within the range from −1 to +1. Non-pregnant cycles acquire negative IPSs that become more negative with increasing numbers of embryos transferred. Pregnant cycles acquire positive IPSs that are tempered by the number of embryos transferred and the number of implantations.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions