The death (mortality) of live born children who have not reached 4 weeks or 1 month of age, usually measured as a rate: number of neonatal deaths per 1,000 live births in a given area or program and time period. Early neonatal deaths (those occurring in the first week of life) are sometimes also reported.
Infant mortality in the first month of life.
Number of infant deaths during the first 28 days of life, per unit of population (e.g., per 1,000 live births) in a given institution, geographic area, or period of time.
The proportion of infants under one month of age who die. In England and Wales this has fallen markedly in recent decades: from more than 28 per 1,000 live births in 1939 to fewer than 5 in 2008. This improvement can be attributed to better antenatal supervision of expectant mothers, including ensuring they have adequate nourishing food; improvements in the management of the complications of pregnancy and of labour; and more skilled resuscitation at birth for those babies who need it.
The number of deaths of infants younger than 28 days of age per 1000 live births per year.