Before revision: The gross reproduction rate (GRR) is the Total fertility rate multiplied by the crude birth rate of only girls or the average number of daughters that would be born to a woman (or a group of women ) if she survived throughout her childbearing years, which is roughly the age of 45.
After revision: The gross reproduction rate (GRR) is the Total fertility rate multiplied by the crude birth rate of only girls or the average number of daughters a women would have if she survived all ofto her childbearing years, which is roughly the age of 45.