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Multilingual Demographic Dictionary, second unified edition, English volume

Cumulative net fertility

Multilingual Demographic Dictionary, second unified edition, English vol.
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Cumulative net fertility  (CUMULATIVE net fertility)

The term cohort fertility 1 refers to the reproductive performance of particular birth or marriage cohorts (116-2). When the age-specific or marriage duration-specific fertility rates are summed from the cohort’s beginning of exposure to risk until some later date, we speak of cumulative fertility 2: cumulative age-specific fertility 3★ or cumulative duration-specific marital fertility 3★ when then ending date is that of a womans birthday or marriage (501-4), completed fertility 4 or lifetime fertility 4 is the cumulative fertility until the date when all members of the cohort have reached the end of the reproductive period. The sum of the products of the fertility rates of the cohort by the probability of survival of the women to successive ages could be called the cumulative net fertility 5, net cumulative age-specific fertility 6★ or net cumulative duration-specific marital fertility 6★ and net complete fertility 7★ or net lifetime fertility 7★ of the cohort.

  • 4. Before the end of the reproductive period, the terms incomplete fertility or fertility to date are employed to show that the cohort’s cumulative fertility may be expected to increase.