"Figure 2: Percentage of neonatal, postneonatal and infant deaths caused by immaturity-related conditions, congenital anomalies and sudden infant deaths, 2016","" "England and Wales","" "","" "Notes","1. Deaths occurring in a calendar year. 2. Neonatal – deaths of those aged under 28 days. 3. Postneonatal – deaths of those aged between 28 days and 1 year. 4. Infant – deaths of those aged under 1 year. " "Unit"," % of neontal, postneonatal and infant deaths" "","" "","Congenital anomalies ","Immaturity related conditions","Sudden infant deaths" "Neonatal","29.1","49.8","1.9" "Postneonatal","32.7","14.2","22.3" "Infant","30.1","39.9","7.6"