Neonatal health care is provided with medication and protocols for almost all morbidities. Before the use of these medicines is allowed, they are extensively studied and tested for efficacy and... Show moreNeonatal health care is provided with medication and protocols for almost all morbidities. Before the use of these medicines is allowed, they are extensively studied and tested for efficacy and safety. As patient population and knowledge on specific diseases changes with time, repeated evaluation of efficacy and safety of current used policies is of paramount importance. In this thesis six __Neonatal Pearls__ are presented: six relatively rare clinical conditions, of which a retrospective study evaluates the efficacy, safety and/or long term consequences of the current protocol. Despite their retrospective design and relatively small sample size, they are all of significant value and may serve as potential foundations for future protocol adjustments and randomized controlled trials. The evaluated clinical conditions and policies include: -Fetal, neonatal and developmental outcomes of lithium exposed pregnancies -Neonatal outcome in allo-immune thrombocytopenia after maternal treatment with antenatal intravenous immunoglobulin - Repeated courses of ibuprofen for closure of a patent ductus arteriosus - Use of rifampin in persistent coagulase negative staphylococcal bacteremia in neonates - Outcome and management in neonatal thrombocytopenia due to maternal idiopathic thrombocytopenic purpura - Short and long term outcome of neonatal hyperglycemia in very preterm infants Show less