Retrospective study on 31.404 births in 1996, 31.581 births in 1997 and 25.965 birhts in 1998 at Tu Du Obstetric and Gynecology hospital to compare rate and causes of the perinatal mortality. Perinatal mortality status during 3 years 1996-1998 were 24.6 ‰,17.8‰ and 16.9‰. Preterm delivery accounts for 9-10% total up to 70% of perinatal mortality. In the cause of preterm and neonatal mortality of 3 years: the first is respiratory distress syndrome and after that is congential malformation, asphyxia, neonatal infection, respectively. In the term mortality, the first is asphyxia, after that is congenital malformation neonatal infection, respiratory distress syndrome, respectively, in which the asphyxia is 0.97% and 42% in all causes of perinatal mortality