 All participants fill in a demographic and Decisional Conflict Scale questionnaire at baseline. After having been presented with the decision aid and made a choice as to CA125, the participants will complete the CollaboRATE and Decisional Conflict Scale questionnaire dealing with confidence as to the choice made and the level of shared decision making experienced. Six months later the Decision Regret Scale questionnaire is to be completed to reveal any regrets in relation to the CA125 decision. 