1. Can noninvasive diagnostic tools predict tubal rupture or active bleeding in patients with tubal pregnancy? 
Ben W.J Mol, M.D., Petra J Hajenius, M.D., Ph.D., Simone Engelsbel, M.D., Willem M Ankum, M.D., Ph.D., Fulco van der Veen, M.D., Ph.D., Douwe J Hemrika, M.D., Ph.D., Patrick M.M Bossuyt, Ph.D. 
Fertility and Sterility 
Volume 71, Issue 1, Pages (January 1999)
DOI: /S (98)00418-X

2. FIGURE 1
The risk of tubal rupture and/or active bleeding as a function of gestational age (A), size of the ectopic mass (B), serum hCG concentration (C), and serum hemoglobin concentration (D).
Fertility and Sterility  , DOI: ( /S (98)00418-X)

3. FIGURE 2
The relation between the predicted and observed probabilities of patients having tubal rupture and/or active bleeding. The predictive performance of the model is acceptable when the 95% confidence intervals of the observed probabilities overlap with the predicted probabilities. The dashed line represents the combinations at which the predicted and observed probabilities are equal. Because this is the case, the predictive performance of the model was acceptable.
Fertility and Sterility  , DOI: ( /S (98)00418-X)