Net reproduction rate
Encyclopedia
The net reproduction rate (NRR) is the average number of daughters that would be born to a female (or a group of females) if she passed through her lifetime conforming to the age-specific fertility and mortality rates of a given year. This rate is similar to the gross reproduction rate
but takes into account that some females will die before completing their childbearing years. An NRR of one means that each generation of mothers is having exactly enough daughters to replace themselves in the population.
The NRR is particularly relevant where sex ratios at birth are significantly affected by the use of reproductive technologies, or where life expectancy is low.
Gross reproduction rate
The gross reproduction rate is the average number of daughters that would be born to a woman if she survived at least to the age of 45 and conformed to the age-specific fertility rate of a given year...
but takes into account that some females will die before completing their childbearing years. An NRR of one means that each generation of mothers is having exactly enough daughters to replace themselves in the population.
The NRR is particularly relevant where sex ratios at birth are significantly affected by the use of reproductive technologies, or where life expectancy is low.
External links
- Net reproduction rate (daughters per woman), UNdataUNdataUNdata is an Internet search engine, retrieving data series from statistical databases provided by the UN System. UNdata was launched in February 2008...
.