A perinatal death is a fetal death or an early neonatal death. The perinatal mortality rate is calculated as: perinatal deaths / total births x 1000. A stillbirth is the death of a fetus weighing 500g or more, or of 22-weeks gestation or more if weight is unavailable. An early neonatal death is the death of a live newborn in the first 7 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.

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