Mean number of offspring born to a female in a specific age class in a given year, expressed per
\(\pu{1000}\) females in that age class.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 718 (https://doi.org/10.1515/pac-2015-1202)