Most such deaths occur in the first month of life, which is called neonatal mortality.

Worldwide, prematurity accounts for ten percent of neonatal mortality, or around 500,000 deaths per year.

An illness severity score and neonatal mortality in retrieved neonates.

In east London neonatal mortality among white and Asian groups was broadly similar.

A Canadian study also found differences in neonatal mortality between different racial and ethnic groups.

Samueloff et al. (1987) described a family in which all 4 children had Fryns syndrome and neonatal mortality.

This improvement was mainly due to the decrease in neonatal mortality, from 15.5 to 3.4 per 1000 live births.

The average across all breeds in the study were 4.3% stillbirth and 3.7% early neonatal mortality.

"Effect of timing of first postnatal care home visit on neonatal mortality: an observational study".

The sum of these two represents the neonatal mortality.