Perinatal mortality (PNM), also perinatal eath, refers to the death of a fetus or neonate and is the basis to calculate the perinatal mortality rate. Variations in the precise definition of the perinatal mortality exist specifically concerning the issue of inclusion or exclusion of early fetal and late neonatal fatalities. Thus the WHO ‘s definition "Deaths occurring during late pregnancy (at 22 completed weeks gestation and over), during childbirth and up to seven completed days of life" is not universally accepted. The perinatal mortality is the sum of the fetal mortality and the neonatal mortality.