Total feility rate is defined as: September 2005
**Core Concept**
The Total Fertility Rate (TFR) is a key demographic indicator that measures the average number of children a woman would have in her lifetime based on the current age-specific fertility rates of a population.
**Why the Correct Answer is Right**
The TFR is a more comprehensive measure than the General Fertility Rate (GFR) as it takes into account the age structure of the population. It is calculated by summing up the age-specific fertility rates (ASFRs) for each age group (usually 15-49 years) and multiplying by 5 to get the average number of children a woman would have in her lifetime. This calculation assumes that the current fertility rates remain constant for the entire reproductive period of women in the population.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the Crude Birth Rate (CBR) is a measure of the number of live births per 1,000 people in a population, not the average number of children a woman would have in her lifetime.
* **Option B:** This option is incorrect because the General Fertility Rate (GFR) is a measure of the number of births per 1,000 women of reproductive age (usually 15-49 years) in a population, not the average number of children a woman would have in her lifetime.
* **Option D:** This option is incorrect because the Net Reproduction Rate (NRR) is a measure of the number of daughters a woman would have in her lifetime, assuming that each daughter has the same reproductive experience as her mother, not the average number of children a woman would have in her lifetime.
**Clinical Pearl / High-Yield Fact**
The TFR is an important indicator of population growth and fertility trends, and it can be influenced by factors such as access to education, family planning services, and economic development.
**Correct Answer: B. General Fertility Rate (GFR) is a measure of the number of births per 1,000 women of reproductive age (usually 15-49 years) in a population, not the average number of children a woman would have in her lifetime.**