This paper explains how value co-creation is affected by the introduction of tools to digitalise healthcare. In particular, this study examines how pregnant women in France collect, utilise, and share their health records after the launch of a new Electronic Health Record (EHR). The paper combines methods from the design field (cultural probes) and micro-phenomenological interviews to capture value co-creation and value co-destruction dynamics. Through analysing nine cases, we highlight the role of patients' expectations in potential value co-destruction with an EHR. We describe why it is important to know by whom and how co-creation is carried out to improve the launch of digital health applications. Finally, the paper emphasises that value co-creation is a long-term process that needs to be studied longitudinally.