Question:medium
Net reproduction rate is defined as which of the following?
Net reproduction rate is defined as which of the following?
Show Hint
It is the fertility index that uniquely accounts for mortality.
Updated On: Jun 24, 2026
- Number of live births per 1000 mid-year population
- Number of live births per 1000 women of child bearing age
- Number of daughters a newborn girl will have during her life time
- None of the above
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: The correct definition of net reproduction rate is the average number of daughters that a newly born female will produce over her whole reproductive span, holding current fertility and death rates constant. That is option c.
Step 2: What separates NRR from other indices is that it factors in mortality. Gross reproduction rate ignores deaths, whereas NRR subtracts the females who die before completing reproduction, giving a truer replacement measure.
Step 3: When NRR equals 1, one mother is exactly replaced by one surviving daughter, signalling stationary population growth and matching the two-child family target. Reaching this needs roughly 60% of eligible couples to practise effective contraception.
Step 4: The other stems are different demographic indicators: births per 1000 total population is the crude birth rate (a), and births per 1000 reproductive-age women is the general fertility rate (b). Hence only option c fits.
\[\boxed{\text{Daughters a newborn girl will have during her lifetime}}\]
Step 2: What separates NRR from other indices is that it factors in mortality. Gross reproduction rate ignores deaths, whereas NRR subtracts the females who die before completing reproduction, giving a truer replacement measure.
Step 3: When NRR equals 1, one mother is exactly replaced by one surviving daughter, signalling stationary population growth and matching the two-child family target. Reaching this needs roughly 60% of eligible couples to practise effective contraception.
Step 4: The other stems are different demographic indicators: births per 1000 total population is the crude birth rate (a), and births per 1000 reproductive-age women is the general fertility rate (b). Hence only option c fits.
\[\boxed{\text{Daughters a newborn girl will have during her lifetime}}\]
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