Question

the fertiallity rate is many developed countries has drooped to about two children per women


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Answer 1

Answer:

This entry focuses on the number of births per woman in a population. The most commonly used metric is the Total Fertility Rate (TFR) – or often simply ‘fertility rate’ – which measures the average number of children per woman.1

The global average fertility rate is just below 2.5 children per woman today. Over the last 50 years the global fertility rate has halved. And over the course of the modernization of societies the number of children per woman decreases very substantially. In the pre-modern era fertility rates of 4.5 to 7 children per woman were common. At that time the very high mortality at a young age kept population growth low. As health improves and the mortality in the population decreases we typically saw accelerated population growth. This rapid population growth then comes to an end as the fertility rate declines and approaches 2 children per woman.2

The first section of the entry presents the global empirical perspective on the number of children per woman. The long second section presents the academic research that answers the question why the number of children per woman declined. Particularly important are 1) the empowerment of women in society and in relationships – through education, labor force participation, and strengthened women’s rights – and 2) the increased well-being and status of children.

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Explanation:

Answer 2

Answer:

The total fertility rate (TFR), sometimes also called the fertility rate, absolute/potential natality, period total fertility rate (PTFR), or total period fertility rate (TPFR) of a population is the average number of children that would be born to a woman over her lifetime if:

She was to experience the exact current age-specific fertility rates (ASFRs) through her lifetime, and

She was to survive from birth to the end of her reproductive life.[1]

It is obtained by summing the single-year age-specific rates at a given time

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