What is the relationship between fertility, fecundity and reproductive span?

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Fertility, fecundity and fecundability

In demography, fertility indicates the product or output of reproduction, rather than the ability to have children. The physiological ability to have children—that is manifest roughly in the period between menarche and menopause in women—is termed fecundity. Demographers define a third, further aspect of reproduction—fecundability—which is the probability of becoming pregnant, or the likelihood of exposure to the possibility, that depends on the pattern of sexual and pregnancy preventive behaviours.

http://www.gfmer.ch/Books/Reproductive_health/The_demography_of_fertility_and_infertility.html

https://en.wikipedia.org/wiki/Fertility