Discussion
The denominator in infant mortality rate is :
Answer: A
The denominator is the total number of live births in a given period.
The infant mortality rate is
\[ \begin{aligned} &\text{IMR} \\ &= \frac{\text{deaths under 1 year in the year}}{\text{live births in the year}} \times 1000 \end{aligned} \]
The population at risk of dying in infancy is the live-born children, so live births are the denominator. Still births are counted in the perinatal or still-birth rates, pregnancies in fertility measures, and total population in the crude death rate.
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