Schematic overview of the multivariable models for live birth prediction.

Only genes and factors that were at least retained once are listed. In Model 1 a maximum of three genes were retained to finalize the model. In Model 2 an unlimited number of genes were allowed into the model, if they could improve the P-value of the model. To try to improve Model 1 and Model 2 patient and cycle characteristics from Table 3 were allowed into the model. Only Model 2 could be improved and resulted in Model 3. x: factor significantly improving the model; #: number; ‘unlimited’ refers to the fact that all 12 genes were allowed into the model if they could improve the model; stim: ovarian stimulation; PPV: positive predictive value; NPV: negative predictive value; AUC: Area under the curve; a: Final type-III P-value