...i.e., 15 or 20 to 44 or 49, is used as an index of fertility when reliable birth statistics are not available. ...births {of. {{RefNumber|41|1|4}} for late foetal death rate or stillbirth rate.)}}

...711|2|IndexEntry=generation reproduction rate|OtherIndexEntry=reproduction rate, generation}} are obtained. The mortality and the fertility rates used in t ...}}) rates. The table which shows the product of the age-specific fertility rate and the number of years lived within this group in the life table is known