Gross reproduction rate
The gross reproduction rate (GRR) is the average number of daughters that would be born to a woman (or a group of women) if she survived at least to the age of 45 and conformed to the age-specific fertility rate of a given year. It is often regarded as the extent to which the generation of daughters replaces the preceding generation of females.
This rate is similar to the net reproduction rate but it ignores the fact that some women will die before completing their childbearing years. See also total fertility rate and replacement-level fertility.
The GRR is particularly relevant where sex ratios are significantly affected by the use of reproductive technologies.
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