Completed cohort fertility

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General definition

The completed cohort fertility (CCF), also called the completed fertility rate (CFR) for a cohort of females (typically, a birth cohort) who have all completed their childbearing years is the arithmetic mean of the values of completed fertility for all females in that cohort.

For a given birth order

Suppose i is a positive integer. The completed cohort fertility at birth order i for a given birth cohort is the fraction of people in that birth cohort that have a birth at birth order i.


Completed fertility rates can be computed only for cohorts that have completed their childbearing years. This creates a huge time lag: we can only calculate completed fertility rates for cohorts that were born 49 or more years ago.

Some sources, such as the Human Fertility Database, provide a piece of information called CCF40: this is the parity at age 40 for the cohort. This may also be broken down by birth order.

Data sources

Data source Data available
United Nations data No direct data available
Gapminder (synthesis of data from multiple sources) No direct data available
Human Fertility Database CCF and CCF40 data available for some OECD countries. Last year for CCF data is the 1960 birth cohort and last year for CCF40 data is the 1969 birth cohort. For some years, the data is available by birth order as well. The country list is Austria, France, Norway, Switzerland, Bulgaria, Germany, Portugal, Taiwan, Canada, Hungary, Russia, U.K., Czech Republic, Japan, Slovakia, U.S.A., Estonia, Lithuania, Slovenia, Ukraine, Finland, Netherlands, Sweden