There is an estimated 3.2 billion population difference between emerging nations with low fertility rates and those with high fertility rates.
Due to the significant decline in fertility, many emerging nations today have the same issues as Europe and the United States: women want children but are unable to do so because of their current socioeconomic and family circumstances.
Children are required in emerging nations as a workforce and to care for their ageing parents. Due to the lack of access to contraception and typically lower levels of female education in these nations, fertility rates are higher.
In general, fertility rates were lower in nations with better social environments or more effective family planning policies than in those with less effective policies.
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