1. External validation of a prediction model for an ongoing pregnancy after intrauterine insemination 
Inge M. Custers, M.D., Pieternel Steures, M.D., Jan Willem van der Steeg, M.D., Thierry J.H.M. van Dessel, Ph.D., Rob E. Bernardus, M.D., Petra Bourdrez, M.D., Carolien A.M. Koks, M.D., Wernard J. Riedijk, M.D., Jan M. Burggraaff, M.D., Fulco van der Veen, Ph.D., Ben W.J. Mol, Ph.D. 
Fertility and Sterility 
Volume 88, Issue 2, Pages (August 2007)
DOI: /j.fertnstert
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

2. FIGURE 1
Calibration plot, showing the association between the predicted chance and observed chance of an ongoing pregnancy.
Custers. External validation of model for IUI. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

3. FIGURE 2 Receiver Operating Characteristic - curve.
Custers. External validation of model for IUI. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

4. FIGURE 3
Prognostic index versus the chance of an ongoing pregnancy after IUI. The prognostic index is calculated from the score chart in Table 3.
Custers. External validation of model for IUI. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions