Separating a mother and newborn at the maternity ward is a challenging, potentially traumatic, and value-laden intervention. Cross-disciplinary collaboration in this tense and intense situation ideally assists child protection services in reaching well-founded decisions. However, differing opinions, professional stances and values can jeopardize the decisional process and threaten the quality of care and rights of the client(s). The main aim is to describe and analyse cross-disciplinary teamwork during pregnancy and the process towards a child protection decision. Participant observation and interviews provided data and descriptions of the case study, analysed according to positioning theory. The results show how two main storylines, a medical-therapeutic and a child protection storyline, each with a set of professional positions, create friction and tension in cross-disciplinary collaboration. The case describes the initial tensions, how they were overcome, and how they finally resulted in a planned removal at birth. This gave the mentally ill mother-to-be the opportunity to participate and prepare for the separation. The study demonstrates how a supervised, structured and reflective collaborative process enabled the participants to deal with conflicts and uncertainties stemming from positions and the dynamics of positioning. Further research and practical experiences, e.g. through simulation training, are needed to inform safe and caring removal practices and validate the usefulness of positioning theory to illuminate interprofessional conflict.