Maternal demographics and additional birth variables (i.e. birth asphyxia, type of delivery, breastfeeding) will be extracted from the antenatal care database and added to the selected cases; laboratory results (G6PD deficiency, ABO incompatibility, haematocrit) are stored in the SCBU database and will be retrieved. The general characteristics, the trajectory of SBR, and the neonatal outcome will be described.