 The data gathered with the DCE-Q will be analyzed with multinomial logistic regression. For each treatment characteristic, analyses will examine whether it contributes significantly to respondents preference. Trade-offs that respondents are willing to make between pregnancy rate and any other attribute i.e. the willingness to trade-off pregnancy rate; WTpreg will be calculated as pregnancy rate is considered the gold standard to benchmark the other fertility treatment characteristics van Empel et al, 2011. Confidence intervals 95 for the WTpreg were computed using a non-parametric bootstrap approach 2000 replications. 