The Net Reproduction Rate (NRR) of 1.0 in a population means:
- A Each woman gives birth to exactly one child on average
- B Each woman is replaced by exactly one daughter surviving to reproductive age ✓
- C Birth rate equals death rate and the population is stable
- D Total Fertility Rate (TFR) equals replacement level of 2.1
Correct answer: B. Each woman is replaced by exactly one daughter surviving to reproductive age
Explanation
Net Reproduction Rate (NRR) = GRR (Gross Reproduction Rate) × probability of a female infant surviving to mean age of childbearing. NRR = 1.0 means each woman is exactly replaced by one daughter who survives to reproduce — the population exactly replaces itself over one generation (zero population growth in the long run). NRR takes into account female-infant mortality, unlike GRR. NRR = 1.0 is not the same as TFR = 2.1, though both indicate replacement — TFR 2.1 is an approximation accounting for sex ratio and childhood mortality.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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