| Peri-natal Mortality Rate (PMR): It is defined as number of foetal deaths (28 weeks gestations & more) + early neonatal deaths (Ist week) in one year per 1000 live births in the same year
Number of foetal deaths (28 weeks gestations & more)
+ Early neonatal deaths (Ist week) in one year
PMR=-------------------------------------------------------------------X 1000
Live births in the same year
Infant Mortality Rate (IMR): Defined as the ratio of infant deaths in a given year to the total number of live birth in the same year, usually expressed as a rate per 1000 live births.
No. of deaths of children less than 1 year of age in a year
IMR=----------------------------------------------------------------------X 1000
No. of live births in the same year
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