What do we call the situation whereby each women of childbearing age gives birth to enough children to keep a population stable?

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Replacement level fertility refers to the average number of children each woman needs to have to ensure that one generation can exactly replace itself without considering migration. Typically, this rate is about 2.1 children per woman in most countries, slightly above 2 to account for the mortality rate among children.

What Do We Call the Situation Whereby Each Women of Childbearing