Before revision: The gross reproduction rate (GRR) is the average number of daughters a woman would have if she survived all of her childbearing years, which is roughly to the age of 45 ; subject to the age-specific fertility rate and sex ratio at birth throughout that period.
After revision: The gross reproduction rate (GRR) is the average number of daughters a woman would have if she survived all of her childbearing years, which is roughly to the age of 45 , subject to the age-specific fertility rate and sex ratio at birth throughout that period.