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fertility
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fertility

Organism's ability to reproduce, as distinct from the rate at which it reproduces (fecundity). Individuals that can reproduce are fertile. Individuals that cannot reproduce are infertile. Individuals become infertile (unable to reproduce) when they cannot generate gametes (eggs or sperm) or when their gametes cannot yield a viable embryo after fertilization. Common causes of infertility are: low sperm numbers in the male; blocked oviducts; infrequent ovulation (release of gamete) in the female; consequence of infections in the female reproductive tract; and genetic makeup.



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? Mentioned in ? References in periodicals archive
 
In my analysis, four indicators related to economic and cultural patterns account for just over half of the variation among counties in the marital fertility index ([ILLUSTRATION FOR FIGURE 1 OMITTED] and Table 1).
'The number and quality of children': education and marital fertility ... by Smith, Daniel Scott / Journal of Social History
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