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→Sub-replacement fertility
== Sub-replacement fertility ==
== Sub-replacement fertility ==
Replacement fertility is the level of fertility that is required to sustain a population without any external inputs. In terms of [[sexual reproduction]], replacement fertility is 2.1 children born per woman/female in a population.
Replacement fertility is the level of fertility that is required to sustain a population without any external inputs. In terms of [[sexual reproduction]], replacement fertility is 2.1 children/offspring born per woman/female in a population.
=== Film documentary Demographic Winter: The decline of the human family ===
=== Film documentary Demographic Winter: The decline of the human family ===