Brain Injury Terms and Definitions

Postneonatal death
Death on or after the 28th day of life and before the first birthday. (See also infant death.)

Infant
An individual less than one year of age.

External cause of death
Death caused by accidents and adverse effects

Neonate
An infant less than 28 days of age.

Neonatal death
Death prior to the 28th day of life.

Live birth
The complete expulsion or extraction from its mother of a product of conception, regardless of the duration of the pregnancy, which after expulsion shows any vital signs (heart beat, voluntary breathing, umbilical cord pulsation, or voluntary muscle movem

Perinatal
Period from 20 weeks gestation through 27 days after birth.

Preterm birth
Birth at less than 37 completed weeks of gestation.

Childbearing years
The reproductive age span of women; conventionally defined as 15 through 44 years of age for the U.S. population.

General fertility rate (GFR)
The number of live births per 1,000 women age 15-44 years in a given year.