During the last two decades there has been an enormous development in treatment possibilities in the field of neonatology, particularly for (extremely) premature infants. Although there are cross-cultural differences in treatment strategy, an overview of the literature suggests that every country is confronted with moral dilemmas in this area. These concern decisions to initiate or withhold treatment directly at birth and, later on, decisions to withdraw treatment with the possible consequence that the child will die. Given that the neonate cannot (...) express his or her own will, who will decide? And on the basis of what information, values and norms? We explored some of these issues in daily practice by interviewing a small sample of health care practitioners in a Dutch university Neonatal Intensive Care Unit (NICU). It turned out that experiencing moral dilemmas is part of their daily functioning. Nurses underline the suffering of the newborn, whereas physicians stress uncertainty in treatment outcome. To make the best of it, nurses focus on their caring task, whereas physicians hope that future follow-up research will lead to more predictable outcomes. As for their own offspring, part of these professionals would hesitate to bring their own extremely premature newborn to a NICU. For the most oppressing dilemma reported – terminating an already initiated treatment – we propose the concept of ‘evidence shift’ to clarify the ambiguous position of uncertainty in decision making. (shrink)