Mortality rate of newborn baby in yogyakarta is increasing every year and asphyxia is on of the causes.besides neonetal death,asdhxia or the failure to ini tiate and sustain breathing at birh affect the brain cells and leads to a development delay This experiment was a cross sectional aiming for studyin asphyxia neonatorum as arisk factor of development delay in 0-12 mont babies at RS PKU Uuhammadiyah yogyakarta of yar 2014