The number of children that one generation must produce to be able to replenish its numbers is called

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The replacement level refers to the number of children a generation must produce to replace itself in the population without accounting for inflows or outflows due to migration. It is typically estimated as 2.1 children per woman in developed countries, which allows for replacement of the mother and father and a small excess to account for early mortality. The fertility rate and birth rate refer to the number of live births per thousand or per woman in a given period, while generational replacement is not a commonly used term in demography.

The Number of Children That One Generation Must Produce to Be