Background: An important-and often missing-element of person-centred care is the inclusion of individual patients' values and preferences. This is challenging but especially important for high-burden fertility treatments. We describe the development of a clinical tool that aims to facilitate the delivery of person-centred fertility care by giving insight into the patients' values and preferences. Methods: We developed the Tell me tool following the three principles of user-centred design: (1) early and continual focus on users; (2) iterative design; (3) measurement of user behaviour. Accordingly, our methods consisted of three phases: (1) conducting semistructured interviews with 18 couples undergoing fertility treatment, followed by a consensus meeting with relevant stakeholders; (2) performing seven iterative improvement rounds; (3) testing the feasibility of the tool in 10 couples. Results: The Tell me tool consists of a ranking assignment of 13 themes and two openended questions. These themes relate to the couples' wellbeing and experience of the treatment, such as mental health and shared decision making. The open-ended questions ask them to write down what matters most to them. The field test showed variation between the individual patients' answers. The tool proved to highlight what is important to the individual patient and gives insight into patients' personal contexts. Conclusions: We developed a tool that gives insight into the values and preferences of the individual patient. The tool seems feasible for facilitating person-centred fertility care.