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US fertility rates hit the lowest level ever recorded during the first quarter of 2017, reflecting both biological and social changes among the population, including delaying child-bearing and electively choosing not to have children. The current downward trend started in 2007-2008 shortly before the global economic crisis, which could have affected financial resources and planning decisions, and has only recently slowed to a decrease of about 1 percent annually as of 2015.

  • During the first quarter of 2017, the general fertility rate in the US fell to 57.7 birth per 1,000 women aged 15-44 years, a decrease of 5.9 percent from the previous quarter and 3.8 percent compared to the same period of 2016. US women aged 40-44 years were an outlier, with the birth rate among these women continuing to increase slightly during the first quarter by almost 1 percent. 
  • In 2015, the United States ranked 138th of 202 economies globally by total fertility rate, according to the World Bank, a slightly lower rate than Scandinavian countries Sweden and Denmark. 
  • African countries have the highest fertility rates globally, making up 14 of the top 15 countries by births per 1,000 women. Afghanistan was ranked 14th in 2015.

US fertility patterns, like those of many other developed countries, highlight differences in social norms that contribute to divergent fertility rates relative to global trends. For example, according to the US Centers for Disease Control and Prevention, the most popular age for childbirth is women aged 30-34 years, a recent shift from the 25-29 year old age group. By comparison, the global average is a full decade younger, with women aged 20-24 years old giving birth at higher rates than any other age group.

  • Social motivations—including work-life balance, educational attainment, and other factors—as well as the availability of maternal care for older mothers and babies born prematurely in the United States has supported growth in the fertility rate of US women aged 40-44 while globally this age group has the lowest fertility rate of all age groups and a negative growth rate.

Socio-economic factors and government policies create financial incentives and social safety nets for families that influence fertility rates while also alter life expectancy and immigration trends that ultimately determine net population growth. For many economies globally, including the US, declining fertility rates are likely a new permanent dynamic in government planning. 

  • The largest decline in US fertility rates during 2016 was among teens, suggesting that US policies targeting fewer teen pregnancies have been successful, on average. Births to teenagers aged 15-17 and 18-19 years old decreased by 10.8 percent and 8.5 percent year-over-year, respectively.
  • While fertility rates among US women aged 35-39 had been trending upward, the first quarter 2017 rate declined to early 2015 levels.
  • Only nine US states showed a positive change in the number of live births in 2016, 15 fewer states than in 2015 and 36 fewer than in 2014. Four US states had more deaths than births as well as the lowest growth rates in live births: West Virginia, Maine, Vermont and (the US territory of) Puerto Rico.

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Population Dynamics | Fertility | Mortality | Age Structure The World Bank has published the 2017 edition of its dataset: "Population Estimates and Projections." This database presents population and other demographic estimates and projections for the period 1960 to 2050. The data are disaggregated by age-group and gender and cover approximately 200 economies. The data also include information about fertility, mortality, and population by age.  According to World Bank, estimated fertility rate will fall by approximately 11 percent, from 2,45 in 2015 birth per women to 2,21 in 2050. In contrast, European countries...

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The population page attempts to provide a general survey among the 12 countries compared by assessing fertility rates, population growth rates, and rates of natural increase.