The number of perinatal deaths per 1000 total births A perinatal death is a fetal death (stillbirth) or an early neonatal death.The perinatal mortality rate is calculated as: A stillbirth is the death of a fetus weighing 500g or more, or of 22-weeks gestation or more if weight is unavailable (ICD 10).An early neonatal death (END) is the death of a live newborn in the first 7 days (i.e., 0-6 days) of life.Great variation exists both between and within countries on how the stillbirth component of perinatal mortality is recorded, particularly for early stillbirths that occur at 22- to 27-weeks gestation. For international comparisons, WHO suggests including only deaths of fetuses weighing at least 1000g, or of 28-weeks gestation or more if weight is unavailable. Presentations of the PMR should include a clear statement of the definition of perinatal mortality used. In practice, in most developing countries accurate data on birth weight or gestational age are difficult to obtain.