A unique aspect of FertiQoL compared with other QoL measures is the optional 10-item treatment module. This module measures QoL in respect of treatment quality (interactions with staff, quality of information), and treatment tolerability (effects on mood, disruptions daily life). These subscales can be used to assess effectiveness of new treatments/medications, to monitor quality of services and to optimize patient treatment experiences. Research has shown that quality of treatment and its tolerability are predictors of treatment satisfaction (Dancet et al., 2010) and willingness to persist with treatment (Olivius et al., 2004) , the latter also shown in the present study. Further a recent large, multi-centered study showed a strong association between a high level of patient-centered care and favorable Fer-tiQoL scores (Aarts et al., 2010) . However, the sensitivity of Treatment FertiQoL for these purposes needs to be investigated in clinical trials of new interventions.