Developing world births 'falling'

Women in the developing world now give birth to fewer than four children on average, according to a major United Nations study on fertility. The average number of births has fallen from 5.9 children in the 1970s to 3.9 in the 1990s, it says. In 20 countries, births have now fallen beneath the number needed to maintain current population levels. The UN Population Division's World Fertility Report says improved contraception is behind the fall.


 overpopulation contraception

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