Adding to rfrey's comment, in demography "reproduction rate" is the number of daughters per woman. I think it's from a more general population biology definiti

Adding to rfrey's comment, in demography "reproduction rate" is the number of daughters per woman. I think it's from a more general population biology definition, the number of female descendants per female. Yes, for the long run reproduction rate matters more. Demographers mostly assume fixed sex ratios at birth, making the point moot. But "fixed sex ratios" is no longer necessarily true, now that the sex of unborn fetuses can be determined and semen can be sex-selected.