JUSTIFICATION: According to the World Health Organization (WHO), 6.6 million children under the age of five died in 2012 - more than 750 every hour. Most of these children could survive and thrive with access to simple, affordable interventions. The loss of a child is a tragedy - families suffer and human potential is wasted. WHO is improving child health by helping countries deliver integrated, effective care in a continuum, starting with a healthy pregnancy for the mother, through birth and care up to five years of age. Investing in health systems is important to delivering this essential care [1, 2]. GOAL: To study perinatal mortality, this is the most important reason of infant mortality in Mongolia. MATERIALS AND METHODS: A retrospective cohort study was conducted reviewing data from 2007-2011 using the ICD code P00-P96 [4] listing “certain conditions originating in the perinatal period”. Data was analyzed using Epi-Info 2000 and GIS software. RESULTS: Data from 2007-2011 showed that 3091 neonates died from conditions originating in the perinatal period and of these 58.7% (1814) were males. Furthermore, the results of this study showed that the leading causes of death were “respiratory and cardiovascular disorders during the perinatal period” (ICD code P20-P29). More specifically, the causes were: - Birth asphyxia (P21) - Respiratory distress of newborn (P22) - Congenital pneumonia (P23) CONCLUSION: National average deaths per 1,000 live births in Mongolia are 9.5—with the highest rates reported in Dornogovi, Uvurkhangai, Bayankhongor, Gobi Altai, Uvs, Zavkhan and Khovsgol.