Net Reproduction Rate (NRR) of 1 indicates that a population is:
- A Growing rapidly with high fertility
- B Declining in size
- C Exactly replacing itself — stable stationary population ✓
- D At the epidemiological transition stage 2
Correct answer: C. Exactly replacing itself — stable stationary population
Explanation
Net Reproduction Rate (NRR) represents the average number of daughters a newborn girl will give birth to over her lifetime, allowing for mortality. NRR = 1 means each generation exactly replaces itself — the population is in equilibrium. NRR > 1 indicates a growing population; NRR < 1 indicates a declining population. NRR takes into account both fertility (births per woman) and mortality (survival to reproductive age), unlike Gross Reproduction Rate (GRR).
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
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