| A | B |
|---|
| birth rate | number of live births/1000 population |
| fetal death rate | number of fetal deaths/1000 live births |
| fetal death | death of fetus weighing 500 gm or more |
| neonatal death rate | number of deaths/1000 live births occuring at birth or in 1st 28 days of life |
| perinatal death rate | sum of the fetal & neonatal rates |
| infant mortality | number of deaths/1000 live births occurring at birth or in the 2st 12 months of life |
| maternal mortality | number of maternal deaths/100,000 live births |
| viable | capable of surviving outside the uterus |
