This article may require cleanup to meet Wikipedia's quality standards. The specific problem is: due to unclear definitions for fertility, fecundity and derivative terms depending on whether the term is being used in demography, epidemiology or clinical medicine. For example fecundity is the potential to for a female to become pregnant and carry that pregnancy to a live birth in demography, while in clinical medicine it refers to actual production of live offspring. Please help improve this article if you can.(March 2019) (Learn how and when to remove this message)
Fecundity is defined in two ways; in human demography, it is the potential for reproduction of a recorded population as opposed to a sole organism, while in population biology, it is considered similar to fertility,[1][2][3] the natural capability to produce offspring,[4] measured by the number of gametes (eggs), seed set, or asexual propagules.
^Etienne van de Valle and Louis Henry (1982). "Fecundity". Multilingual demographic dictionary, English section, second edition. Demopaedia.org, International Union for the Scientific Study of Population. p. 621-1. Retrieved 8 February 2010.