1. Prognostic factors influencing fresh and frozen IVF outcomes: an analysis of the UK national database 
W. Mark Hirst, Andy Vail, Daniel R. Brison, Stephen A. Roberts 
Reproductive BioMedicine Online 
Volume 22, Issue 5, Pages (May 2011)
DOI: /j.rbmo
Copyright © 2011 Reproductive Healthcare Ltd. Terms and Conditions

2. Figure 1
Fitted live birth rates (LBR) for all fresh transfers. Box plots show predicted LBR across the dataset and lines show the predicted LBR for the reference patient.
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
Copyright © 2011 Reproductive Healthcare Ltd. Terms and Conditions

3. Figure 2
Fitted twin rates for all fresh double-embryo transfers. Box plots show predicted live birth rate across the dataset and lines show the predicted live birth rate for the reference patient.
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
Copyright © 2011 Reproductive Healthcare Ltd. Terms and Conditions

4. Figure 3
Predicted twin rates versus live birth rates in fresh double-embryo transfers in the HFEA dataset. For clarity, only a random sample of 3000 points are shown. LBE=live birth events.
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
Copyright © 2011 Reproductive Healthcare Ltd. Terms and Conditions

5. Figure 4
Fitted live birth rates for frozen transfers. Box plots show predicted live birth rate across the dataset and lines show the predicted live birth rate for the reference patient.
Reproductive BioMedicine Online  , DOI: ( /j.rbmo )
Copyright © 2011 Reproductive Healthcare Ltd. Terms and Conditions