female fertility index

https://doi.org/10.1351/goldbook.10845

In rodents, number of pregnant females divided by the number of females mated, multiplied by 100.

Note: This index measures the female’s ability to become pregnant and may be used as a general indicator of fertility.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 768 [Terms] [Paper]